UpTrade - Web site created using create-react-app
Trade2save.com - Trade2save.com GET MORE CASH!
Gazelle - Buy and Sell your used cell phones and electronics. Sell your iPhone, Samsung Galaxy, iPad and more for cash, or buy used iPhones, iPads and other cell phones. More than one million customers trust Gazelle.
FarewellCell.com - Sell cell phones, iPhones and mobile devices online. Get cash when you trade in your iPhone, iPad, or iPod. Fast Payment and Free shipping.
Swappa - Swappa is, in fact, an e-commerce website working as a platform for dealing with used smartphones, tablets, and mobile phones related accessories as well.
Glyde - Glyde is a web site dedicated to dealing in used smartphones, tablets, Mac Books and gaming consoles.