Auction.com
Won the auction on site, but then was told I didn't. Don't bid!
Bet on the home and gained on auction.com. After not reading from auction.com in 72 hours approached them. They stated I had been not the champion in the end, whatever site explained. Additionally mentioned, that somebody put a bet for $53,500 and I put exactly the same one fro $53,000 after, and ...