Voltorb #164 from the Pokémon 151 Collect set is classified as an Unknown rarity card, currently valued at $2.99. As part of this popular set, it features the Electric-type Pokémon, adding to its appeal among collectors. While not particularly rare, its value reflects its status within the set and the ongoing interest in Pokémon trading cards. Collectors often seek this card to complete their collections or for its nostalgic significance.