Samsung Galaxy ace for £125 to £150 and maybe swaps for Galaxy S2 ?

I have a used Samsung Galaxy Ace for sale between the price of 130 to 150. i may also swap the phone for a Samsung Galaxy S2. The phone is in good condition and comes with a 2GB memory card, a Screen protector and a flip case (the flip case is sort of broken but can be used untill you get another one). The phone is only locked to 3 which can be unlocked for 10 i am not doing it through Paypal but Money in cash and only calls or emails please :)