iphone 4 on o2 black ?

hi there , here i have my iphone 4 on 02 network. the back cover is smashed and a crack on the front screen (hence the price), it works fine and i have had a quote for getting the back and front replaced at 60 so not to bad really. you could actually just have the back done(20) as the front is just 1 crack which doesnt affect the viewing of the screen.......please ring/text sam on 07892813827........200 ono