iphone 4 16gb black with box on o2 *

i have an iphone 4 16gb black phone for sale. it comes with charger, box and everything that was included when first bought. this phone has hardly been used (was only used as a back up phone once or twice) and is an unwanted gift. is in perfect condition, no scratches, marks, knocks or falls. am looking 400 or will consider decent offers. any questions please ask thanks emails are checked every half an hour.