There are a lot of fellows that like to play games and "snipe" a bid in the last few second of an auction. They feel that they get the item for a cheaper amount than if they bid straight up.
I personally do not have the time to play those kind of games. I bid what I feel is my maximum and forget it until it is over. I never up my bid and I never will pay my maximum after the sale is over. I have been contacted by the seller several times after the auction is over. They try to convince me that the "winning" bidder did not pay for the item and they want me to pay my last bid for it. Tough luck.
All the game playing has made Ebay PIA to buy on. So I rarely buy there anymore unless it is a buy-it-now deal.
The rest can play their games to win a few dollars less on a item. I don't have the time for it. There are other places to buy the same things without the headaches.