During my last online auction using Proxibid, I have some great concerns. During 2 items up for auction, I was the high bid when the time ran out and once updated someone else was the buyer. On 2 later items up for auction, I raised my maximum bid with no other bidders and Proxibid raised my purchase price with no apparent in between bidders. My worst experience yet. Have left bids in past but could not watch the auction. This makes me wonder about doing that again.