Tamiya's Unknown N64 Prototype

To be perfectly honest, if the seller of the incredibly obscure prototype cartridge you see above didn't sport a 100% positive feedback score (by more than 1000 people), I wouldn't consider posting about it. It is after all an auction for the prototype cartridge of Tamiya Racing 64; a game nobody seems to have heard of and thus an incredibly rare prototype of an unreleased Nintendo 64 game. Seller ships worldwide and this is bound to be expensive.

Apparently and according to the seller the game was developed by Intermetrics, a company supposedly close to Looking Glass Studios, whereas it does seem to sport quite a few similarities with Mini Racers. Hope the buyer gets to further investigate things...