How much trade in value for iPhone 5?

I have an AT&T IPhone 5 that I got in June. Kinda wanna get the new IPhone 5S. Does anyone know how much trade in value I can get toward it and if I will get any other deal if I upgrade to iPhone 5S?

If its in good shape then your 5S would be free if buying a new contract, because 5 will trade in for more then $199. If its over 199, then they will also give you store credit for the extra $ (at least thats how the Apple store does it, I think I would trade it in there but not sure how at&t does it)