Looking for a cheap galaxy S2 black or white, preferably under £300 -

hi there, i am new to gumtree. i am placing an ad as i am looking for a samsung galaxy s2 after mine was stolen on a night out in rotherham. i dont mind slight usage wear and tear, obviously this is expected on used phones. i have a sim so would prefer the phone to be on o2 or unlocked to any network.