iphone 3gs 8gb 3network +

hi i am selling my iphone 3gs 8gb on 3 network with its box charger usb and unused headphones , it is only a year old , only selling as i want an iphone 4 , i have 2 covers , the phone works great and never lets me down , it has a tiny dink at the the top of the screen but you dont notice it , i has a screen saver on it from new so the screen is in mint condition , no swaps or offers , it is £100 no less , text or call , thanks for looking