Iphone 3gs 8gb vgc to swap for blackberry torch -

iphone 3gs 8gb on o2 not sure if its unlocked. very good condition few slight scratches on the back but can hardly tell they are there. had a case on the back the whole time. looking to do a swap for a blackberry torch 9800 or 9810 on o2 swap to be done preferably in daventry as cant drive thanks