Maybe it's a regional thing, but I've always considered N64 HM a "high-uncommon" because we generally have one in stock all the time. Maybe it was just a short print run? Starcraft and Ogrebattle seem to be the same way.

Previous to 2000, it was scarce, but then over the summer of that year, the Funcolands I worked in always had one in stock (one would sell, and a few days later we would get a replenishment).

Now, the SNES version....I think that ones a littler harder to find.