iphone 4 8gb unlocked -

hi there im selling my black 8gb iphone 4,its in pristine new condition not a mark on it fully boxed .no headphones though,and its not a contract phone i have the reciept for proof of purchase which will be included,has been officially unlocked thru itunes has apple warranty till middle of april next year,may swap for another good phone on o2 or unlocked if its mint,please no timewasters or silly offers as wont reply, thanks for looking,250 or may swap for right phone,