Apple Iphone 3GS 8GB with original box water damaged +

Apple Iphone 3GS water damaged. I have upgraded to IOS 5.0, 8GB, on 3 network originally, but I have jailbroken it as well, though I have no sim card to test it. You would find cydia installed on it. The phone Switches on, asks for wifi password, shows the home screen, but due to some reason switches off randomly and then turns on again itself. I think the battery is the issue, worth about 20 quid job. But I have bought myself Iphone 4 now, so cant really get time to repair it. Immaculate condition, no scratches on the back or front, just the usual signs due to the age of the phone. I have used the phone for 10 months. Screen protector is on it, protective back cover included which has got signs of wear on it. With original box, sorry no charger! and the headphones are chinese as well. I am open to sensible offers.