Pre-Emptive Bid

In an auction, someone might jump the line and agree to buy the item at an amount sufficient to induce the seller to skip the auction all together, in preference to waiting for the auction. This is called a pre-emptive bid. In a pre-emptive bid, the bidder says she will not re-bid if the seller refuses her offer. And this applies pressure on the seller to skip the auction all together, and sell outright.