24/7 Auction Site is a term used to describe the online marketplace eBay. eBay is an American multinational e-commerce corporation based in San Jose, California that facilitates consumer-to-consumer and business-to-consumer sales through its website. It allows buyers and sellers to interact in the online auction format, with the ability to bid on items and purchase them immediately. eBay also offers services such as payment processing, shipping, and customer service.