Before they went bye-bye..
On the eBay auction Web site, a Dutch auction is a type of online auction selling format a seller might use if he or she is listing multiple identical items for sale. In a Dutch auction, buyers specify the quantity of the items they would like to purchase and the amount they are willing to pay for each one. Winning bids are determined by multiplying the bid price by the number of items bid on. Also called multiple item auction.
Webopedia.