[quote name='_heretic']Damn, I didn't know about any game stores in Houston except Gamestop (and Game Crazy, I guess). I'm going to have to check out Games Plus, and maybe Play N Trade. Are there any others I should know about?[/QUOTE]
There is a place called Game Time on El Dorado off of 45 - lots of NES generation and later games there, but it's kind of disorganized and there aren't price tags on anything. I've talked to the guy that runs the place and he told me it's just him, so no doubt there's a ton of stuff he doesn't have placed out on the floor yet, but if you dig around and look behind the counter you might find something. He's got lots and lots of old systems (SNES and N64s) - I bought a Saturn off him for $40.
There's a place in Alvin called DND that has some cool stuff - but their best stuff isn't for sale (ROB, Virtual Boy, Colecovision) for some reason. I did pick up a complete Strider for Genesis for $4.
Of course pawn shops are also good places to find some deals or rare items for cheap if the owners don't realize what they are selling.