People are spending this money because they are rare, there's no way around that. Comparatively, 20,000 PSA graded Fleer Michael Jordan rookie cards are out there and they all command a very high price, always at least 4 figures. Twenty. Thousand. Jordan hasn't played basketball in nearly 20 years, but the popularity is still there. Sure he might be the GOAT. Mario 3 is arguably the NES GOAT. It's just all dependent upon demand. Will Mario 3 be able to command that type of popularity in demand? Time will tell.