I started my kick from a craigslist post for a Yard Sale that said they'd have all old consoles. In retrospect I should have picked up a SNES while I was there because she was selling them for way under internet prices. This lady had no less than 10 of every console from Intellivision to last gen. Grabbed a few off of eBay and went back to dealing with the seedy underworld (craigslist). Met this dude who had a bunch of games (got MM3 and a few other games from him for $3) who then told me if I was interested, this guy had a stack o' games of all systems at a local flea market.
A few weekends later I had a Saturday off so I went to said flea market with my trusty Brettmatic and found the motherlode. Any game I wanted from these crates that must have had over 2k games for $5. Even got a dogbone from him for $5. Brett almost got a complete TG-16 with Keith Courage.
Here is a thread on NintendoAge where people get salty for blowing up local spots. I however love it.