Cell for Cash
http://www.cellforcash.com/Cash in exchange for cellphones.
Cellphone Bank
http://www.911cellphonebank.org/If your cellphone does not have any trade-in value, you can donate it to Cellphone Bank, who re-purpose phones as emergency 911 phones for charities and shelters.
Gazelle
http://www.gazelle.com/Sells/recycles a large array of gadgets such as cellphones, satellite radios, movies, video games, digital cameras, camcorders and laptops. Gazelle provides a box and pays the shipping charges. The buyback price depends on the device and it's condition and Gazelle gives you a check or Amazon gift card in return.
Simply Sellular
http://www.simplysellular.com/Buys used cellphones from 25+ manufacturers by sending you a postage paid envelope and then a check in about 45 days. The phones are re-purposed as emergency 911 phones for charities and shelters.
