>>47671815The reason why the LOZ cart was so expensive is because of the rarity; people didn't hoard sealed NES games in 1987 like they did when Pokemania reached the United States in 1998. There are thousands of RBY/GSC cart boxes in circulation and a decent amount of sealed ones in collections as well. Sealed ones are certainly valuable, but a lot less rare than you think.
>pic related, not sealed though