How much does an iphone 4 sell for?

I want to sell my iphone 4 because I have a new phone, but do you think it's worth it? I mean… How much would I be able to get for it? The phone is Sprint and have no damage to it. Which place would be best to sell it at?

Try eBay or craigslist. On ebay do it for an auction and put a good description and several photos. Lots of people will bid on it and chances are someone will pay more than it is actually worth… I have seen someone sell a used iPhone 4 for about 350 plus shipping.