I think this is where you buy the item from the seller without having to place a bid on an item at an auction vs. bidding on items and waiting to see if someone outbids you....

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Note added at 59 mins (2010-06-09 19:32:45 GMT)
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Buyout auction is an auction with a set price (the 'buyout' price) that any bidder can accept at any time during the auction, thereby immediately ending the auction and winning the item.[20] If no bidder chooses to utilize the buyout option before the end of bidding the highest bidder wins and pays their bid.[20] Buyout options can be either temporary or permanent.[20] In a temporary buyout auction the option to buy out the auction is no longer available after the first bid is placed.[20] In a permanent buyout auction the buyout option remains available throughout the entire auction until the close of bidding.[20] The buyout price can either remain the same throughout the entire auction, or vary throughout according to preset rules or simply at the whim of the seller.[20]

Natalia,

Michel34's answer made me wonder if the bid was for everything being sold (where you place a bid and you buy everything being sold at the auction), but according to everything I am finding, this is not the case at all..... Please see the description provided above) According to this description, my suggested answer is correct.