TipTop, the new app from Postmates’ founder and CEO, now lets you buy devices with trade-ins and cash

TipTop, the startup that offers instant cash for electronics, is launching TipTop Shop, a way for users to purchase and trade in devices. TipTop Shop builds on the success of TipTop Cash, which was released late last year. It lets people get instant payouts for electronic devices like smartphones, iPads, cameras, game systems and more.
Many people sell old devices in…