iPHONE 3GS 16GB IN BLACK FULLY WORKING O2 ?

IPHONE 3GS 16GB IN BLACK FULLY WORKING WITH NO FAULTS WHATSOEVER. I HAD THIS PHONE FOR JUST OVER 1 YEAR THE SCREEN IS IN MINT CONDITION DUE TO ME ALWAYS HAVING SCREEN PROTECTORS ON IT SINCE IVE HAD IT. BACK COVER IS IS GOOD CONDITION WITH GENERAL WEAR AND TEAR, IVE ALWAYS HAD A CASE ON IT BUT DUE TO CHANGING CASES THERE ARE SCRATCHES ON BACK COVER ON ALL CORNERS AND BOTTOM AND TOP, AND 1 VERY VERY SMALL CHIP ON BOTTOM CORNER, IVE TRIED TO GET THEM IN PHOTOS SO PLEASE LOOK. PHONE HAS BEEN UPDATED TO LATEST IOS SOFTWARE AND HAS NO FAULTS, PHONE WAS BROUGHT ON O2 CONTRACT BUT COULD BE UNLOCKED TO ANY NETWORK BUT I CANT CHECK THAT AS EVERYONE I KNOW IS ON O2 ASWELL.