iPhone 4s Black 16gb - Immaculate condition with warranty ?

I have for sale my iphone 4s which is unsed and in immaculate condition. The phone was opened to try out SRI, but it didnot convince me to keep the phone. I will continue to use my old iphone 4, which i think is similar to 4s. i am open to WHY. please dont make any silly offers as i am not desperate to sell the phone. The phone is on t-mobile/orange network can be easily unlocked if required.