iphone 3g 8gig must go asap sale, swap or part ex +

i have an iphone 3g 8gb in good condition has always had screen protector on small hairline crack at charging port does not affect phone use or charging with usb charger lead box and 2 cases on orange network looking to swap for another iphone unlocked or three or o2 or a phone of similar value. or will sell for the right price! £110 ovno feel free to make offers as i am open to all offers