I sold my iPhone 5 to MaxBack, and I was absolutely pleased with the experience.
I was kept up-to-date at each and every step, and the transaction was fast and easy. Would highly recommend!
Not sure it can get much better!
I reviewed several sites in order to sell back my iPhone. MaxBack gave me the best price, and they shipped me a box (awesome padding design!) to send my phone to them. They sent me a check within a few days for the amount I expected to receive... no hassle, no haggling, no worries!