buyout price; immediate decision price
Used in auction contexts for a price at which an item can be purchased immediately, ending the auction.
A buyout price is set for this auction.
I won the item at the buyout price.
即決 means 'immediate decision' and is used in broader contexts, while 即決価格 specifically refers to the buyout price in auctions.
Compound of 即決 (immediate decision) and 価格 (price).