I used Pipes to get a feed of specific categories of used video games and game systems from Craigslist in college and beyond. I got a lot of stuff that way, and visited many parts of the cities I lived in that I otherwise wouldn't have.
For resale or collection? I used to hit up our local vintage store (next to my high school) and pick up all the donated NESs and games to resell on eBay (probably back to the people who's parents donated that old useless junk...)
