Buyer bid aggressively throughout auction. Auction had a reserve placed on it. Buyer had high bid a few days before the auction was scheduled to end, but had yet to crack the reserve. The day before the auction was to end, buyer bid against himself to bump the price up to the point where he finally cracked the reserve. When nobody else bid, he wound up winning the auction. The next morning I received a message from him via eBay's message system that he would not pay. Here was his exact message: "Sorry, but i think im going to back out on this. Please cancel for me as im not going to make this purchase. Thanks and sorry for all the problem." I knew that he also sold video games as well as purchased, but it was the morning after that I found out he placed his own copy of the SAME game up for sale on eBay. this constitutes auction tampering. This man made certain to end my auction with him being the winner so that he could take me out of the running and give his game a better chance of selling.