I've had that happen to me. Your best bet is to doublecheck and make sure there aren't lots of your item listed when you post your items. The more that are there, the less likely you are to get a good price for it. Unless its something OOP, rare, and desirable. Then you'll almost always get people going into bidding wars on stuff, especially if it starts with a lower starting bid. Of course you take a chance of it only selling at the starting bid by doing that. I've never really seen it happen on rare, OOP, and in demand stuff though.