Other things to consider:
Super Mario 64 Film Camera Even more obsolete, and not as uniquely shaped, but it exists.
Animal Crossing originally came out for the N64…but only in Japan. Here’s the original cart.
Game Boy Four-Player Multitap Not easy to find, but the only way to play Faceball.
Complete Nintendo 64 Game Collection 163 offers but no buys yet….
Four SNES Plastic Dust Protectors This item may not look exciting, but every new SNES cart used to come with one, and used carts almost never do.
Rule of Rose Two sealed copies of the PS2 game appeared on eBay today and commanded high bid prices; one is gone already.