Georgia-Pacific Corporation operates a large number of sawmills and manufacturing plants. In 1978, Georgia-Pacific sold an obsolete sawmill trimmer from its plant in El Dorado, Arkansas, to a used equipment dealer. The trimmer was eventually sold to Moisés Galindo’s employer and was involved in an accident in which Galindo was severely injured. This appeal presents the question whether, by virtue of the 1978 sale and other sales of used equipment, Georgia-Pacific is “engaged in the business of selling” such equipment for purposes of the doctrine of strict liability for product defects under section 402A of the Restatement (Second) of Torts. We conclude from the record before us that unresolved questions of fact preclude an answer to that question at this point in the litigation. Accordingly, we vacate the summary judgment in favor of Georgia-Pacific.
I.
Background
The few facts that have been developed thus far are not in dispute. Moisés Galindo (Galindo) worked for Middlebrook Lumber Company (Middlebrook) at a sawmill in Nacogdoches, Texas. On August 21, 1980, he suffered severe injuries while operating a sawmill trimmer. Galindo alleges that the defective condition of the trimmer caused his injuries. Following the accident, he filed this diversity lawsuit for damages under Texas law against several parties that he claims manufactured or marketed the allegedly defective trimmer.
Galindo’s complaint alleges that Georgia-Pacific Corporation (Georgia-Pacific) once owned the trimmer that caused his injuries. According to the first amended complaint, Georgia-Pacific sold the trimmer to defendant Modern Iron Works, Inc., (Modern Iron Works) who in turn sold it to Middlebrook. It is undisputed that from 1960 to 1978 Georgia-Pacific in fact owned a trimmer similar to the one involved in Galindo’s accident. Georgia-Pacific 1 purchased a new trimmer in 1960 and used it at its El Dorado, Arkansas, plant until 1978. In *1215 1978, the trimmer was sold to Vincent Rice (Rice). If Georgia-Pacific’s trimmer is the one involved in Galindo’s accident, Rice must have sold it to Modern Iron Works who in turn sold it to Middlebrook. 2
Georgia-Pacific moved for summary judgment on the ground that, even if it sold the trimmer involved in Galindo’s accident, and even if the trimmer is defective, Georgia-Pacific is not liable for Galindo’s injuries because Georgia-Pacific is not engaged in the business of selling sawmill trimmers. According to the motion for summary judgment, Georgia-Pacific’s sale of the trimmer was an isolated, “occasional” sale upon which strict liability may not be premised.
The district court granted summary judgment on the strength of an affidavit from Georgia-Pacific which avers that Georgia-Pacific “is not in the business of selling trimmers.” The affidavit establishes that Georgia-Pacific sold the trimmer to Rice in 1978 because it was no longer needed in the operation of the Arkansas plant. The affidavit also establishes, however, that sale to equipment dealers and other parties is one of three ways that Georgia-Pacific regularly disposes of equipment that is no longer needed at its various plants and sawmills; Georgia-Pacific also sometimes “scraps” used equipment or transfers it to other places within the corporation.
Galindo opposed the motion for summary judgment on the ground that Georgia-Pacific’s affidavit itself establishes that the company is engaged in the business of selling trimmers and other used sawmill equipment. The affidavit demonstrates, in Galindo’s view, that sale of used equipment is a regular means of disposition. Answers to interrogatories reveal that Georgia-Pacific operates more than 240 plants and mills around the world. From this, Galindo argued that Georgia-Pacific’s sales of used equipment are extensive enough to constitute a “business” in which Georgia-Pacific is “engaged.” 3
Noting the absence of relevant Texas caselaw, the district court made an “Erie guess” that
the Texas courts, when the question is considered, will determine that sales of depreciated owner-user equipment, even when such sales are quite numerous, will not remove the seller from the category of “occasional seller” [and place him in the category of one “engaged in the business of selling”] ..., if the sales are of equipment used by the seller in its business and not otherwise any part of a line of products or goods sold by the seller in its ordinary course of business.
(Emphasis supplied.) Since Georgia-Pacific uses sawmill trimmers in its business to produce a “line of products,” which consists of building materials, pulp, paper, packaging, chemicals, and plastics, the district court granted summary judgment for Georgia-Pacific. 4
On appeal, Galindo argues, not only that the district court erred in finding Georgia-Pacific to be an occasional seller, but that we should reverse with directions to enter a partial summary judgment that Georgia-Pacific is engaged in the business of selling for strict liability purposes. 5 *1216 This argument is based on a liberal reading of Georgia-Pacific’s affidavit to assert that the company “usually” disposes of used equipment by sale, together with an inference, from Georgia-Pacific’s corporate size, that such sales are quite numerous. Georgia-Pacific argues, on the other hand, that the affidavit cannot reasonably be construed as an admission that Georgia-Pacific “usually” sells its retired equipment; moreover, Galindo cannot rely on an unsubstantiated inference from Georgia-Pacific’s size alone that used equipment sales are numerous. Finally, Georgia-Pacific argues that the district court correctly determined that the Texas Supreme- Court would hold that a seller of depreciated equipment used to produce goods, the production and sale of which constitute the seller’s primary business, is not engaged in the business of selling such equipment.
II.
Summary Judgment
Texas substantive law, of course, governs this diversity suit.
See Erie Railroad v. Tompkins,
(1) One who sells any product in a defective condition unreasonably dangerous to the user or consumer or to his property is subject to liability for physical harm thereby caused to the ultimate user or consumer, or to his property, if
(a) the seller is engaged in the business of selling such a product, and
III.
Texas Law of Strict Liability
Texas has adopted section 402A of the Restatement (Second) of Torts.
6
See McKisson v. Sales Affiliates, Inc.,
*1216 (b) it is expected to and does reach the user or consumer without substantial change in the condition in which it is sold.
(2) The rule stated in Subsection (1) applies although
(a) the seller has exercised all possible care in the preparation and sale of his product, and
(b) the user or consumer has not bought the product from or entered into any contractual relation with the seller.
*1217
The district court determined that the Texas courts would exempt from liability, on an occasional seller rationale, those who sell “depreciated owner-user equipment ... if the ... equipment [was] used by the seller in its business and [is] not otherwise any part of a line of products or goods sold by the seller in its ordinary course of business.” The court apparently concluded that Texas courts would reach this result regardless of the number of
*1218
sales or the extent of sales efforts.
9
We cannot agree. To assess the validity of this determination, we begin with the rationale underlying strict liability for product defects. Comment c to section 402A provides the following justifications for strict liability: (1) those engaged in the business of selling products have assumed a special responsibility to the public; (2) the public is often forced to rely on commercial sellers and has a right to expect that they will stand behind their products; and (3) the commercial seller is better able to spread the loss caused by defective products. The Texas courts have not only adopted the rule of section 402A but have apparently embraced this statement of its rationale.
See Pittsburg Coca-Cola Bottling Works v. Ponder,
*1217 In matters of Texas substantive law, our relationship to the Texas Supreme Court is all but identical to that of a Texas intermediate appellate court. Indeed, if it differs at all, as regards substantive innovation it is weaker instead of stronger than that of such a court. Even in the rare case where a course of Texas decisions permits us to extrapolate or predict with assurance where that law would be had it been declared, we should perhaps — being out of the mainstream of Texas jurisprudential development — be more chary of doing so than should an inferior state tribunal.
*1218 It is clear that the rationale for imposition of strict liability is served only if the defendant is in the business of releasing products into the stream of commerce. The existence of a business justifies consumer reliance and the assumption that the seller has undertaken a special responsibility for product safety, and supplies the mechanism for loss spreading. According to comment f, “[t]he basis for *1219 the rule [that occasional sellers are not strictly liable] is the ancient one of the special responsibility for the safety of the public undertaken by one who enters into the business of supplying human beings with products which may endanger [their] safety ..., and the forced reliance upon that undertaking on the part of those who purchase such goods.” The comment provides two examples of occasional sellers: (1) “the housewife who, on one occasion, sells to her neighbor a jar of jam or a pound of sugar” and (2) “the owner of an automobile who, on one occasion, sells it to his neighbor or even sells it to a dealer in used ears.” These examples involve “ordinary individuals] who make[ ] isolated sale[s],” a category into which Georgia-Pacific obviously does not fall. The rationale expressed in comment f, however, reveals that the occasional seller category is not necessarily limited to such facts. At least on the face of comment f, the occasional seller category applies where sales are so infrequent or sales efforts are so minimal that it cannot be said that the seller has voluntarily assumed a special responsibility for product safety, that the public has the right to expect that the seller will stand behind the product, or that the seller is best able to spread the loss caused by the product’s defects.
As we have already noted, there is no Texas case discussing in detail the requirement that the defendant be engaged in the business of selling the defective product. The district court based its analysis on the following prerequisites to section 402A liability which the court distilled from the Texas cases: “(1) [a] commercial or commercially based transaction is required” and “(2) ... the source of the product must have more than a merely incidental relationship to the transaction, arising either because the product is one the source produces, distributes, or otherwise has a vested interest in placing into the stream of commerce, or because the manner in which the product is passed from the source to the user creates the comment f ‘forced reliance.’ ” (Citations omitted.) Even if we agree that this is a fair summary of Texas law, we do not believe that it necessarily follows that “getting rid of the depreciated equipment used for production of the goods and services that constitute the business of the seller” can never constitute a business in which the seller is engaged.
The first principle upon which the district court based this conclusion—that a transaction must be commercial—simply means that the product must be made available to the consuming public.
See Armstrong Rubber, 570
S.W.2d at 376 (stream of commerce means “release[ ] in some manner to the consuming public”);
Thate,
The district court cited no authority that compels a conclusion that Texas courts would construe the occasional seller doctrine to embrace all sellers of depreciated equipment that had been used in the seller’s business without regard to the extent of sales activities. Texas courts have given no indication that such a rule is imminent and analogous cases from other jurisdictions do not support such a rule. In fact, our review of the caselaw reveals that most of the decisions that have found the seller of depreciated equipment used in the seller’s business to be an “occasional seller” involved a single sale or transaction in which the rationale for imposition of strict liability was lacking.
11
In
Bruce v. Martin-Marietta Corp.,
In short, we find no basis for the district court’s conclusion that the Texas Supreme Court will ultimately determine that the seller of depreciated equipment used in his primary business will never be considered engaged in the business of selling such equipment. Rather, we believe that there may well exist circumstances in which, because of the number of sales or *1221 the extent of sales activities, a seller of depreciated equipment would fit squarely within the rationale for imposition of strict liability as it has been recently stated by the Texas courts. It would be premature on the record before us to attempt a definitive delineation of those circumstances. The relevant inquiry, however, is whether the seller’s conduct would justify a conclusion that (1) he has undertaken a special responsibility for product safety; (2) the public has a right to expect that he will stand behind the product; and (3) as between the consumer and the seller, it is equitable to impose upon the seller the loss caused by the product and the burden of spreading that loss as a cost of doing business.
IV.
The Summary Judgment Proof
The summary judgment record consists of a meager showing on the issue of Georgia-Pacific’s status as a business seller of used sawmill equipment. The affidavit of Arnold Jones, the plant manager of Georgia-Pacific’s Arkansas plant, establishes that (1) the trimmer was sold in 1978 because it was no longer needed in the operation of the Arkansas plant; (2) Georgia-Pacific only sells sawmill trimmers and other used equipment when it decides to take equipment out of service at its plants or sawmills; and (3) Georgia-Pacific does not sell every piece of used sawmill equipment that it takes out of service; some equipment is “scrapped” or transferred to other plants or sawmills within the corporation. The affidavit also states the conclusion that Georgia-Pacific “is not in the business of selling trimmers.”
Galindo did not specifically counter the averments of the affidavit. We conclude, however, that the affidavit did not discharge Georgia-Pacific’s burden of showing that there are no genuine issues of material fact and that Georgia-Pacific is entitled to judgment as a matter of law. We note first that the affidavit’s statement that Georgia-Pacific is not engaged in the business of selling sawmill trimmers is merely a conclusion which could not shift the summary judgment burden to Galindo. As we read Texas law, a determination whether one is engaged in the business of selling depends on an analysis of the totality of the circumstances surrounding sales efforts, in the light of the rationale underlying imposition of strict liability. Whether a finding that one is engaged in the business of selling is la-belled a conclusion of law, a mixed question of law and fact, or an ultimate fact, the general statement that Georgia-Pacific is not engaged in the business of selling trimmers, without reference to the specific nature of sales activities, is not competent summary judgment proof. We have long recognized that mere statements of conclusions of law or ultimate fact cannot shift the summary judgment burden to the nonmovant.
See, e.g., Gossett v. Du-Ra-Kel Corp.,
Absent the conclusory claim that Georgia-Pacific is not engaged in the business of selling sawmill trimmers, the affidavit cannot support the summary judgment. The affidavit leaves many material fact questions about Georgia-Pacific’s sales of used sawmill equipment unanswered. For example, Georgia-Pacific made no showing with respect to (1) the number of used equipment sales made by Georgia-Pacific; (2) the amount of revenue generated by those sales; (3) the number of employees or the extent of other corporate resources devoted to making the sales; or (4) the use of advertising or other marketing techniques to publicize the availability of used equipment for sale. While summary judgment may have been proper under the district court’s view of Texas law, under which these questions are immaterial, it cannot stand under our understanding of comment f. Since the affidavit leaves open the possibility that these questions will be answered in a manner favorable to Galindo, summary judgment for Georgia-Pacific was improper.
Georgia-Pacific’s reliance on
Bailey v. ITT Grinnell Corp.,
In
Bailey,
there was nothing in the record to indicate that defendant had made other sales of punch presses. The affidavit stated that, but for the sale of the press involved in the case, defendant had never been a seller of punch presses. In this case, on the other hand, Galindo does not have to infer from Georgia-Pacific’s size that it has made more than one sale. The affidavit itself states that other sales have in fact been made. Moreover, the affidavit does not make a prima facie showing that, although other sales have been made, sales efforts do not rise to the level of a business in which Georgia-Pacific is engaged. On the record before us, that is an open question. Cf
. Walker v. Skyclimber, Inc.,
What we have said thus far obviously disposes of Galindo’s claim that the record *1223 conclusively shows that Georgia-Pacific is in fact engaged in the business of selling used sawmill trimmers. There is simply not enough evidence in the record to say, one way or the other, whether Georgia-Pacific is engaged in the business of selling used sawmill equipment. Since Georgia-Pacific did not discharge its summary judgment burden, the judgment must be vacated, without prejudice to the possibility of resolution of the issue by summary judgment on an adequate record.
V.
Conclusion
For the reasons set forth above, the summary judgment is vacated, and the case is remanded for proceedings consistent with this opinion. Georgia-Pacific shall bear the costs of this appeal.
VACATED and REMANDED.
Notes
. Actually, the trimmer was purchased by Reynolds & Draper Lumber Co., which owned the Arkansas plant in 1960. Georgia-Pacific purchased the Arkansas plant from Reynolds & Draper in 1969.
. George Middlebrook, the owner of Middle-brook Lumber, testified by deposition that his company purchased the trimmer from Modern Iron Works. Georgia-Pacific’s records unequivocally establish that its trimmer was sold to Rice. For purposes of the summary judgment motion, the district court assumed that Rice sold the Georgia-Pacific trimmer to Modern Iron Works who in turn sold it to Middlebrook.
. Galindo did not file a cross-motion for summary judgment on the "business of selling" issue. His arguments would have been more appropriate if he claimed that genuine issues of material fact exist with respect to Georgia-Pacific’s status, rather than that the record conclusively shows that the company is engaged in the business of selling.
. The district court also severed Galindo’s claims against Georgia-Pacific from the rest of the lawsuit to create the final judgment from which Galindo appeals.
. If the record warrants, we may direct entry of summary judgment in favor of Galindo even though Galindo did not file his own cross-motion for summary judgment in the district court. See C. Wright, A. Miller & M. Kane, Federal Practice and Procedure: Civil 2d § 2716 (1983).
. Section 402A provides:
. Comment f provides:
f. Business of selling. The rule stated in this Section applies to any person engaged in the business of selling products for use or consumption. It therefore applies to any manufacturer of such a product, to any wholesale or retail dealer or distributor, and to the operator of a restaurant. It is not necessary that the seller be engaged solely in the business of selling such products. Thus the rule applies to the owner of a motion picture theater who sells popcorn or ice cream, either for consumption on the premises or in packages to be taken home.
The rule does not, however, apply to the' occasional seller of food or other such products who is not engaged in that activity as a part of his business. Thus it does not apply to the housewife who, on one occasion, sells to her neighbor a jar of jam or a pound of sugar. Nor does it apply to the owner of an automobile who, on one occasion, sells it to his neighbor, or even sells it to a dealer in used cars, and this even though he is fully aware that the dealer plans to resell it. The basis for the rule is the ancient one of the special responsibility for the safety of the public undertaken by one who enters into the business of supplying human beings with products which may endanger the safety of their persons and property, and the forced reliance upon that undertaking on the part of those who purchase such goods. This basis is lacking in the case of the ordinary individual who makes the isolated sale, and he is not liable to a third person, or even to his buyer, in the absence of his negligence. An analogy may be found in the provision of the Uniform Sales Act, § 15, which limits the implied warranty of merchantable quality to sellers who deal in such goods; and in the similar limitation of the Uniform Commercial Code, § 2-314, to a seller who is a merchant. This Section is also not intended to apply to sales of the stock of merchants out of the usual course of business, such as execution sales, bankruptcy sales, bulk sales, and the like.
. In
Rhynes v. Branick Manufacturing Corp.,
. Perhaps, by including the phrase "not otherwise any part of a line of products or goods sold by the seller in its ordinary course of business," the district court recognized that there may be circumstances in which the seller of retired equipment used in the seller's primary business is "engaged in the business of selling” the used equipment. If so, the district court nonetheless erred because the court did not inquire whether any of those circumstances obtain here. As we develop later, Georgia-Pacific’s affidavit does not demonstrate that there are no remaining fact questions that are material to this issue.
. Moreover, Texas cases have applied section 402A in a manner consistent with this statement of its underlying rationale. For example, the Texas courts have not demanded literal adherence to section 402A’s requirement that the defendant "sell" the product. Strict liability applies to those who lease products.
See Rourke v. Garza,
Texas courts have not been reluctant, however, to refuse extension of section 402A in cases in which its rationale is thought not to apply. In
Armstrong Rubber Co. v. Urquidez,
.
See, e.g., Bailey v. ITT Grinnell Corp.,
