Cheap(er) Gaming Laptop?

I already have a laptop, and I have tons of Sims PC games, but I don't want to download them all onto my new laptop because I use it for the internet, homework, etc. I didn't want to have to get another laptop, but I can't part with my sims games, so I would prefer a laptop built for gaming. It doesn't have to be super duper nice, but I don't want a piece of crap either. Budget would probably be $400-$500?