What is the best place to get the most money for a used cell phone? ?

What is the best place to get the most money for a used cell phone? Some details and preferences: - I live in NYC; NY places are fine, but I prefer an easy online way. - I prefer advice from people who already used the service they mention in their answer.

Public Comments

1. sell it on ebay or try and sell it back to your carrier, if thats possible
2. www.flipswap.com Reputable site. Free shipping. Really easy to use.