Apple iphone 4 £300 ON 3 NETWORK !

I HAVE AN IPHONE 4 IN BLACK SELLING AS IT ONLY WORKS FOR THE NETWORK 3 HAS A SLIGHT BLEMISH ON THE TOP LEFT CORNER OF SCREEN BUT DOESNT AFFECT THE MOBILE IN ANY WAY IS UP TO DATE IOS: 5.1.1 ANY OFFERS SUCH AS TRADE ARE VALID AS LONG AS IT HAS SAME VALUE