In general appraisers of real estate and collector cars do discount auctions and will include them only when there aren't enough comps, and then with with disclaimers. That is true until the exceptions become the rules, ie, the dominant market makers. For many years I would only include a bank foreclosure or short sale with extreme caution and disclaimers, even going out of the region to find a similar comp. That worked UNTIL those foreclosures and short sales dominated the market. It's very hard to claim a house is worth 500K when two short sales next door for 300K and two more around the corner for sale unsold. With what, over 15? Ford GTs coming on the auction market inside a week, it would be difficult for anyone getting a formal appraisal to not have the auction numbers factored in. But we don't know what will happen!!! The fact that someone is flipping mine says they think it was an anomoly and still believe there is profit to be had. I don't know. Time will tell.