Killer 7 is a notable card from the JP Gamecube set in Union Arena, reflecting the game's unique narrative and artistic style. As a non-foil card with a rarity classification of n/a, it currently holds a market value of $59.99. Collectors appreciate its connection to the acclaimed title, with recent sales data indicating steady demand among fans of the series. Its presence in the market underscores the enduring interest in classic video game memorabilia.