How much is my iPhone 4S worth?

I have a 16 GB, Black, and Factory Unlocked iPhone 4S. I have had it for less than a year and want to sell it. How much would it typically be worth/sell for?

Just under £300

$200

All the answers above are not true.

You have a FACTORY UNLOCKED phone! This puts at atleast $500!

The iPhone 5 16GB is $649 (LOCKED!)

So your 4S is an easy $500

Its worth £255 on this UK recycling site http://www.buysellmyiphone.co.uk/SellMyIPhone.aspx?modelid=5&condid=1&networkid=2

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