htc one x white- unlocked- boxed- new!! swap for iphone 4s?? ?

excellent phone see full specs: http://www.gsmarena.com/htc_one_x-4320.php with box and all original accs including: charger plug, usb, sealed earphones.. phone has screen protector on from day one and silicone case (included in sale).. please note i am a genuine seller i will provide hand written receipt/acknowledgment of sale... selling due to me missing iphones too much... looking for iphone 4s as a swap (only 4s please) if not cash! cash on collection only please..i will not post to abroad or out of leicester-hence CASH ON COLLECTION ONLY!--so no scammers etc plz because i will not reply.. to all u genuine folks-thanks for looking!!