The term 'For Sale Site' can be summarized by the crossword solution 'eBay'. eBay is an online marketplace where people can buy and sell goods. It was founded in 1995 and has become one of the world's largest online marketplaces, with over 182 million active buyers and sellers. eBay offers a wide variety of products, from electronics to clothing, and provides a secure platform for buyers and sellers to conduct transactions.