What happens is that someone has put in a bid previous to yours. E-Bay will automatically bid up that persons bid to his chosen maximum. Lets say the existing bid is $100.00. The person who put that bid in may have bid against a previous bid of $99.00. He may have bid $105.00 but only needed $100.00 to beat the previous bid. Now you log on and bid $101.00. The person who bid $105.00 will have his bid automatically increased to beat your bid up to a maximum of $105.00. Definatelly a game but I wouldn't call it a scam. You just need to know that while you are looking at a high bid, the person who put that bid in may have agreed to a maximum bid above what you see and E-Bay has some margin to bid up to that point when another bid comes in.