Flash Buy Flash Buy is a Feature that allows the seller to state a price that any buyer can outright purchase the auctioned item for. Once a buyer has purchased the auctioned item using the Flash Buy feature, the auction will be closed if it is a Standard Auction. Multiple Item auctions allow buyers to use the Flash Buy option to buy any amount of items from 1 up to the total items listed. When the Flash Buy option is used for Multiple Item auctions, the quantity available will be reduced by the quantity purchased until the available quantity is exhausted.