Well, the winning bidder has given tons of negatives, so that's out the window.
Plus there is no way for the seller to know who is going to be bidding on their items beforehand unless the potential bidder asks the seller a question. So that doesn't seem likely.
So for some reason the seller just plain doesn't like me or that I purchased similar items like his in the past or there is some kind of conspiracy going on....I do buy the same type of items as quite a few other people and find myself bidding against them in many auctions. So who knows, one of the other bidders may have contacted the seller and inquired if I was asking questions about the item and asked him to ban me. But that would be far-fetched and pretty low of anyone to do that. I thought maybe the seller was blocking those with less than so many feedback, but there were bids by buyers with less than 10 feedback, so that doesn't appear to be a likely scenario. So I guess I'll never know.