Is this cheap Gaming PC any god?

I'm looking for a pretty cheap gaming PC. I want to play things like Dragon Age Origins, and maybe Left4Dead. If anyone could have a look at this and tell me if it was OK, I'd really appreciate it: http://cgi.ebay.co.uk/WIN-7-PC-E3400-500GB-4GB-DDR3-GAMING-5570-1GB-/380305765934?pt=UK_Computing_DesktopPCs&hash=item588 I realise I probably wont be able to play fast running games like battlefield BC2. Also do you think this is a PC I will be able to upgrade later if I need to? -Thank you