Koffing, a Master Ball Reverse Holo rarity card from the Sv2a 151 set in Pokémon Korean, holds the collector's attention due to its unique design and status within the set. As card #109, it represents a notable Pokémon from the franchise, yet it currently has a market value of $0.00, reflecting its availability and demand. Collectors often seek this card as part of a complete set or for its aesthetic appeal.