noun
shill bidding; shill bid
Refers to the practice of placing fake bids at an auction to drive up the price, often by a confederate of the seller. サクラ is a slang term for a shill or plant.
オークションでサクラ入札が発覚し、出品者が逮捕された。
Shill bidding was uncovered at the auction, and the seller was arrested.
サクラ入札は法律で禁止されている。
Shill bidding is prohibited by law.