Iphone 3gs 32gb unlocked -

I have an iphone 3gs 32gb for sale the phone has been jailbroken and runs ultrasn0w so will work on any network originally on orange currently on 5.1.1 one problem the proximity sensor does not work everything else works fine this can be fixed for 20 i just did not get it done because it did not bother me that much the phone has just had a new screen so its in mint condition the back is not too shabby either both screws from the bottom are missing but i may find them before the phone is sold comes boxed with charger and plug and sim pin 150 OVNO May swap W.H.Y