Why did the winning bid win the auction if it was less than the bid increment over my bid?
The bid increment amount is added to the current item price, not to the current maximum bid amount, to determine the next minimum bid for an item. Because of this, it is possible to be outbid by less than the bid increment amount.
In the example below, where the bid increment amount is $1.00, bidderA was the first bidder and entered a bid amount equal to the $5.00 starting price. Since they were the first bidder, they became the high bidder, the item price remained $5.00, and the next minimum bid was set to $6.00 (the bid increment amount over the current item price). bidderB then placed a bid of $15.00, a valid bid because it met the minimum of at least $6.00. After their bid, bidderB became the high bidder, the item price increased to $6.00, and the next minimum bid then needed to be at least $7.00. bidderA then placed a bid of $15.02, a valid bid since it met the minimum of at least $7.00. Since bidderA's bid amount was higher than bidderB's bid amount, bidderA became the high bidder and the item price increased to their bid amount of $15.02.
Complete Bid History (All Bids)
Bidder Bid Amount High Bidder Item Price Time of bid
bidderA $15.02 bidderA $15.02 4/11/2006 7:44:46 AM
bidderB $15.00 bidderB $6.00 4/11/2006 6:28:54 AM
bidderA $5.00 bidderA $5.00 4/6/2006 6:56:07 PM
Last Updated: 10/20/2021