If anyone is in the Decorah area, Mr. Groovy's in downtown is closing at the end of July. They are a used movie/music/game/electronics store. Right now their closing sale is 40% off last I checked. This includes all systems (they don't have next-gen tho) and games (and everything in the store). Their selection isn't that good, but they have quite a bit of older stuff and some harder to find stuff that usually go for $10 - $20.
The owner isn't knowledgeable about video games and uses Gamestop's used prices as his guide. If it's older than what Gamestop has, then he gets eBay or Amazon, but even then he misses a lot. Picked up Silent Hill, Wild Arms 1 & 2, Alundra, Breath of Fire IV, and Vagrant Story all for $2.99 each when he first opened 2-3 years ago. He had them with his normal copies and not behind the case with the rare stuff.
If anyone is interested in what rare stuff he has, I can always check. I do recall seeing X-Files for PS1 there since he first opened. Poor poor X-Files.