The biggest problem is finding enough from one seller . If you're looking for a setting (ie. Battletech or Shadowrun) you may want to search for lots if you don't already have a lot of the titles. That's how I got most of my Ravenloft books. I'm missing one now but I probably won't get it anytime soon if ever since I'm not paying $40+ for it.
Pretty much. Far Cry or Assassin's Creed come to mind.