Most large retailers offer trade-in programs where you receive a gift card or store credit rather than cash. This is often the most convenient option if you are already planning to purchase a new device. Best buy is retail store I think. Craigslist
Selling your used cell phone can be done through major national retailers, specialized electronics stores, or automated kiosks, depending on whether you want instant cash, store credit, or the highest possible payout. Major Retailers (Trade-in for Credit) what stores buy used cell phones
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