delivered the opinion of the Court.
The respondent sued the petitioner in the District Court for the Northern District of Illinois for failing to complete payment of the purchase price of 50 cars of onions which the respondent had sold to the petitioner in December 1955. Jurisdiction was based on diversity of citizenship. The petitioner interposed the defense that the sale was made pursuant to and as an indivisible part of an agreement which violated § 1 of the Sherman Antitrust Act, 26 Stat. 209, as amended, 15 U. S. C. § 1. A motion was made to strike this defense and therefore the facts underlying it must be taken to be those set up in the petitioner’s answer. Petitioner and respondent were both *517 engaged in the marketing of onions. Petitioner, who was a grower of onions, admitted that he bought the onions from the respondent. But he alleged that the respondent and one Sam Siegel had represented to him and to other onion growers that they were the owners of substantial amounts of onions in storage, controlling 600 cars in the Chicago area and 400 more elsewhere throughout the country; that respondent and Siegel further informed the petitioner and other growers, at meetings called for the purpose in November and December 1955, that unless the growers purchased a large quantity of these onions, the respondent and Siegel would deliver them on the futures exchange for the purpose of depressing the futures price and the cash market price of onions. The petitioner and the other growers, who usually sold through trade channels, were fearful that this would cause them considerable loss. It was finally agreed by the petitioner and other growers that they would purchase 287 of the 600 cars of onions stored in the Chicago area, and the respondent and Siegel agreed not to deliver any onions on the futures market for the remainder of the current trading season. The petitioner and the other purchasers themselves agreed not to deliver any of the onions purchased from respondent and Siegel on the futures market for the remainder of the season; this was “for the purpose of creating a false and fictitious market condition,” and “to fix the price of onions and limit the amount of onions sold in the State of Illinois.” The District Court granted respondent’s motion and struck the defense as insufficient in law. 1
*518
The District Court then found, on the undisputed facts, that petitioner had in fact purchased the 50 cars of onions from the respondent, at an agreed price of $960 per car, plus storage charges incurred after sale; that petitioner had withdrawn 13 cars of the onions from the designated storage places after the sale, but had not withdrawn the remainder; that while petitioner had made some payments on account of the sale, he had come into default on them; and that, when the onions began to show signs of deterioration, the respondent properly, after repudiation of the purchase by the petitioner, withdrew the remaining cars from storage and sold them for petitioner’s account. The District Court entered summary judgment for the unpaid purchase price and storage charges, less the amounts obtained on the sale by respondent, the market price having declined in the interim. The Court of Appeals for the Seventh Circuit affirmed.
As a defense to an action based on contract, the plea of illegality based on violation of the Sherman Act
2
has not met with much favor in this Court. This has been notably the case where the plea has been made by a purchaser in an action to recover from him the agreed price of goods sold. In
Connolly
v.
Union Sewer Pipe Co.,
The petitioner recognizes the import of the holdings in
Connolly, Wilder
and
Small,
but he argues that they involve situations where a person not party to any unlawful agreement sought to defend against the action on the grounds of the seller’s unlawful
acts;
where the purchaser is party to the unlawful agreement and the agreement bears some relation to the suit, the petitioner claims he is not to be held to the purchase price. The distinction asserted is, to say the least, on its face paradoxical; and the petitioner quotes from this Court’s opinion in
McMullen
v.
Hoffman,
In any event, an analysis of the narrow scope in which the defense is allowed in respect of the Sherman Act indicates that the principle of distinction is not what the petitioner claims it to be. The leading case here in which the defense was allowed is
Continental Wall Paper Co.
v.
Louis Voight & Sons Co.,
Accordingly, while the nondelivery agreement between the parties could not be enforced by a court, if its unlawful character under the Sherman Act be assumed, it can hardly be said to enforce a violation of the Act to give legal effect to a completed sale of onions at a fair price. And while analysis in terms of “divisibility” or some other verbal formula may well be circular, see 6 Corbin, Contracts, § 1520, in any event, where, as here, a lawful sale for a fair consideration constitutes an intelligible economic transaction in itself, we do not think it inappropriate or violative of the intent of the parties to give it effect even though it furnished the occasion for a restrictive agreement of the sort here in question. Cf.
Cincinnati, Portsmouth, Big Sandy & Pomeroy Packet Co.
v.
Bay,
Affirmed.
Notes
Petitioner also interposed defenses of illegality under the Commodity Exchange Act, § 9, 42 Stat. 1003, as amended, 7 TJ. S. C. § 13, and the Illinois Antitrust Act, Smith-Hurd Illinois Ann. Stat., c. 38, §§ 569, 573, 574, and a counterclaim alleging respondent’s breach of the nondelivery agreement. These issues were decided adversely to the petitioner below and are not preserved by him here.
Without deciding the point, we shall assume that the petitioner's allegations duly charged a violation of the Sherman Act.
