Auction sites are online platforms where individuals and businesses can buy and sell items through bidding. Users can list items for sale, and potential buyers place bids over a specified period. The highest bidder at the end of the auction wins the item. Popular auction sites include eBay and Heritage Auctions. These sites offer a wide range of products, from collectibles and antiques to electronics and clothing. Sellers can reach a global audience, while buyers can find unique items at potentially lower prices. Auction sites often provide user ratings and feedback to ensure trust and safety in transactions.