I've got the following 2600 carts up for grabs:

Basketball (Atari text label) - $2
Demons to Diamonds (Atari version, label is mottled) - $1.75
Laser Blast (end label slightly faded) - $1.75
Othello (Atari picture label) - $2
Star Voyager (picture label) - $3

I also have these Atari 8-bit computer carts:

Adventure Creator - $8
E.T. Phone Home - $4
Missile Command - $3

All carts have been tested and work fine. If you want to buy the whole lot, PM me with an offer.