Hi all. Surprised Nobody has mentioned that the auction they all go to is the various Wilsons Auctions around the country. An example can be seen here: https://www.wilsonsauctions.com/auctions/car/AuctionEvent?saleCode=W437&location=Newport While it is TRADE ONLY there is a possibility that you could work with a dealer to get a car from there.
BCA & G3 are also big players.