When i was at a local game shop the other day, i saw someone trade in this game for £9 (i went into game, gamestation and an independent store so it was in one of these, but i cant remember which one).
Today im looking for some decentr but cheap games and come accross it on the HMV website at £5.99 from £29.99.
I also got a 10% student discount and will get 5% from going through quidco. Also if you have the small mc donalds HMV tokens, you could get even more off.
I dont know much about the game, but it is rated 15.