Picked up a stack of loose 7800 carts today at one of my Goodwills for 99 cents each. Too bad my 7800 console is flaky, I'd love to at least test them.

Ballblazer
Choplifter
Crack'ed
Dark Chambers
DK Jr
Galaga
Ms Pac Man
One on One Bball
Pole Position 2
Robotron 2084
TD Football
Winter Games