A No Reserve Auction is an auction format where the item being sold is guaranteed to be sold to the highest bidder, regardless of the final bid amount. In this type of auction, there is no minimum price or reserve price set by the seller, meaning the item will be sold to the highest bidder, no matter how low the winning bid may be. No reserve auctions are often used to generate excitement and competitive bidding, as participants know they have a genuine chance of winning.

This auction format can lead to great deals for buyers, as there is no price floor protecting the seller's interests. On the other hand, sellers should be cautious when opting for a no reserve auction, as they might risk selling their item at a price lower than expected. It is crucial to consider the market value and demand for the item before deciding on a no reserve auction.