eBay - Buy and sell electronics, cars, fashion apparel, collectibles, sporting goods, digital cameras, baby items, coupons, and everything else on eBay, the world's online marketplace
Listia - Place bids and shop for items that other people place on Listia. The app is easy to use and understand, and you don't need a lot of money to get started or to make purchases.
OnlineAuction.com - Auction site for buying and selling online.
Openbazaar - A free online marketplace to buy and sell goods / services using Bitcoin. OpenBazaar is a peer-to-peer ecommerce platform with no fees or restrictions.
Haven by OB1 - Shop, chat, and send crypto currencies privately using Haven
Aliexpress - AliExpress is the largest e-commerce site in the world!