If I don't have a dealer's license, can I buy at the auction? Online Auction Support December 14, 2020 21:51 Updated Public Bidders are permitted to attend the GSA sales only, and are welcome to attend. Click Here to view the GSA Calendar. Related articles How do I become an auto dealer? How does the auction work? When is your next GSA Sale? Comments 0 comments Please sign in to leave a comment.