IPHONE 4s 16GB BLACK O2 MINT CONDITION ?

I AM SELLING MY IPHONE 16GB AS I AM UPGRADING TO THE 64GB VERSION FOR MORE MEMORY. IT IS ONLY A MONTH OLD, IN VERY GOOD CONDITION. IT IS ON THE 02 NETWORK. THE ONLY THING IS I HAVE LOST THE HEADPHONES HENCE THE REDUCED PRICE. I HAVE THE PHONE AND CHARGER/USB CABLE BUT THE BOX IS IN GUILDFORD SO I CAN CHARGE 20 LESS WITHOUT THE BOX BECAUSE IT IS MORE CONVENIENT FOR ME. PRICE WITH BOX = 270 WITHOUT BOX = 250