I always buy my games straight from the company who made it. Basically, on the Apple downloads site, it has all the games developers submit and links to their site, so I go and download a whole bunch of trial versions, and then if I like them, I buy them from the developers, not other sites because I believe that the people who make the games should get 100% of the profits, and not have to share 30% (or thereabouts) with game selling companies.