What's the rarest videogame(s)/console(s) you own

[ModifiedDuck]

I own a copy of The Void for PC. I hadn't even heard of the game before I bought, it was kind of an impulse buy at 20€. Pretty damn good, and it seems that very few people know of it. My rarest console would be a GBA bundled with Mario vs Donkey Kong, which has a red top half with a giant M on top, and a white bottom half. Damn thing is a tank. I was pretty brutal with it as a child and even though I gave it to my little sister years ago, who hasn't been any kinder to it, it STILL works fine.