I have a number of cartridges for various console systems available for sale. The current list includes:

Atari 2600
Atari 7800
NES
SNES
Master System
Genesis

You can find the offerings at http://www.slor.net/trade/carts/, and lists will be updated as I add or sell items. If you see anything you like, just drop me a line here and include your cash offer(s).

Thanks!