Samsung Galaxy S2 16GB Black (Virgin new Sealed)might be unlocked ?

up for sale, i have 2x Samsung galaxy S2 both in black 16gb on Virgin mobile but might be unlocked not sure because i have not opened the boxes.they are brand new still sealed never opened.(please see the pictures).. i do accept 250 for each of them cash on collection. anyquestion please contact me: 07427 777329 thanks...