They are everywhere. Listings that offer a low starting bid or Best Offer. Not the traditional higher price or (lower) best offer. These are maddening. I encountered a seller who I made an offer to on one of these listings. He told me that he doesn't accept offers until the fourth day of the auction. How stupid is that? So why put it out there for a best offer in the first place? You have no idea how realistic or unrealistic the seller is. The only way around this would be to contact the seller and ask how much they would accept and see if you can make a deal.