I have the following for trade or sale. Most of these were used in my show:
Xenophobe - 2600, NEW
Seaquest - 2600, Loose
Spider Fighter - 2600, Loose
Double Dragon - Sega Master System, Complete
Rampage - Sega Master System, With Box, No Manual
Rampage - 2600, Loose
Space Invaders Retro Arcade Plug n Play (see vid below) with Instructions