This is Ebay's automatic bidding system. If the current bid for an item is at $20, and the next person bids $50, the price will increase to $21 instead of jumping to $50. If a third person comes and bids $30, he will not be shown as the highest bidder. The 2nd person will still be the highest bidder but the item price will be increased to $31, until someone else bids higher than $50.
4/28/12 at 2:08pm