41 C.F.R. § 102-38.35 – Sales methods.

(a) You may use any method of sale provided the sale is publicly advertised and the personal property is sold with full and free competition. You must select the method of sale that will bring maximum return at minimum cost, considering factors such as:
1. (1) Type and quantity of property;
2. (2) Location of property;
3. (3) Potential market;
4. (4) Cost to prepare and conduct the sale;
5. (5) Available facilities; and
6. (6) Sales experience of the selling activity.
(b) Methods of sale may include sealed bid sales, spot bid sales, auctions, or negotiated sales and may be conducted at a physical location or through any electronic media that is publicly accessible.