No, at current exchange rates, 20 Pounds is around 31 dollars, not 50.
Anyway, that being said, my offical recommendation to other people about sfc3 has been "Wait until the patch". And that will continue to be my recommendation. The game is good enough to be fun to a large majority of people, which is why I don't say never to buy the game. However the bugs counteract the pluses of the game to some extent. To deny this is to put a hand over one eye and claim that the world exists in 2d.
I don't want to have to deal with calls from friends like "Why doesn't the mission continue when I beam the ambassador over to Unity Station?". Once the bugs are fixed, I could see a group of us getting down on some LAN action; at the very core, it's a fun game.
-Alpha