I'm looking to buy a set of 2600 commons. I'm not quite sure how many games this entails, though. I already have:

Pac Man
Defender
Combat
Kaboom
Grand Prix
Adventure
Breakout
River Raid

I was thinking maybe if anyone had the a lot of the common games that everyone with a 2600 game back in the day, I could buy them from you (hopefully reasonably cheaply ) Anyway, if anyone is interested in striking a deal, PM me. Thanks!