damn, I remember the first place to "buy/trade old video games" near me. I brought in a shitload (like a dozen) old NES games I didn't play anymore and that was when I learned I would not be getting a dozen new games, but rather something like one game which wasn't even new. always a sucker's deal.
you know there have got to be storage places all over the US where those places dumped inventory after they failed, full of like copies of Excitebike and Bayou Billy that would take like 10 minutes of blowing on the cartridge and other magic surgeries to get to load.