What can a buyer do if an auctioneer takes a bid on the seller's behalf without notice?

When an auctioneer takes a bid on behalf of the seller without informing the bidders, this can create a situation where the integrity of the auction process is compromised. In such instances, the buyer has the right to void the sale or accept the last valid bid submitted in good faith. This is primarily because the buyer was not made aware of the auctioneer's actions, which arguably undermines transparency and fair competition during the bidding process.

Voiding the sale ensures that the buyer is not unfairly disadvantaged by the auctioneer's undisclosed actions, maintaining fairness in the transactions that occur at the auction. Alternatively, accepting the last good faith bid reflects the final legitimate bid made by the participating buyers before the auctioneer's questionable intervention.

This option emphasizes the importance of clear communication and fair practices in auctions, allowing buyers to protect their interests.