StockX is an online marketplace that allows users to buy and sell sneakers, streetwear, watches, and designer handbags. Founded in 2015, it has become a popular platform for trading collectible items. StockX operates as a middleman between buyers and sellers, ensuring that transactions are safe and secure. The platform is often referred to as the "stock market of things" due to its unique approach to pricing and trading items. Users can find a wide range of products, including limited-edition releases and popular brands like Nike, Adidas, and Supreme. The platform has expanded its offerings to include trading cards and other collectibles, making it a go-to destination for enthusiasts and collectors.