This same exact thing has happened to me on football helmets. It happened twice on the same helmet. I did not accept the second chance offer either time as I was pissed. I sent an email to the seller and stated if he didn't bid on his own helmet, perhaps it would sell. He stated that the winning bidder did not follow through on his bid, yet the second chance offer came fairly soon after the auction ended - both times. It finally sold "again" recently, and I am waiting for it to be relisted again.