Apple iphone 4 16gb with siri and cydia !

i have a fully boxed iPhone 4 in perfect condition charger ear phones lead and manual the iPhone 4 is jailbreak and locked to o2 network but works with giffgaff sim as well but to get unlocked be 15 pounds from o2 this iPhone 4 is upgraded to siri this iPhone as 16 gb memory selling for 300 bargain price no time wasters only genuine callers and no one overseas to contact me as will not replay back