I was selling numerous fish...only one winner replied to my "congratulations...you won" emails. All the rest won the auctions, but never were in contact with me...I did contact them to try and work it out, but nothing.
Good experience on aquabid. Sometimes auctions look fishy (sorry), and they often are. Just use common sense when buying. And feel free to mention flaky auctions to the guy who runs it. He has frequently suspended auctions waiting for the seller to prove he actually has the fish.