Those kits include a working Sega Genesis cartridge, complete with custom box art. The cartridge has a minigame featuring ...

Aside from the cartridge itself, this deal includes the classic Sonic item box and all the promotional materials it came with ...

you might remember that SEGA created an all-new Genesis cart as a neat bit of promotion. The cart itself didn't contain anything too special (character images, posters and a small minigame), but ...

But it went from selling over 30 million Sega Genesis consoles at the height of its fame in 1993 to selling just 3 million units of its final console before pulling the plug on its hardware empire.