I recently bought Saints Row: The Third for like $10. The problem is, the framerate drops from 50-60 indoors to 30 outside and an awful 10-15 while driving. This is on a pretty powerful gaming laptop I bought about six months ago. Changing the graphics settings from maximum (what the game recommended) to even the lowest didn't do anything. I did a little looking around and found that there's a massive thread on the Volition boards that started right after the game's launch with people who all have the same problem. People are still posting in it, too. It seems that SR3 has issues with a lot of AMD graphics cards (which my laptop has) and a few Nvidia cards. A Volition employee eventually responded saying that they were working on a fix for it with AMD. Close to two years later and that fix still hasn't been released. The funniest part is that AMD is advertised when you start the game up.
Driving in SR3 is a large part of the game so having to do it at 10-15 frames makes it sort of unplayable. Reading through some of the thread I mentioned made me feel really bad for people who paid full price for the game. Heck, I felt cheated paying $10 for something I only got 30 minutes out of.