Umbreon from the Sandstorm set is a Rare Reverse Holofoil variant card, numbered #24, currently valued at $80.38. Over the past 30 days, its market value has surged by 211.4%, reflecting increased collector interest. With 603 copies graded by PSA, it holds a modest gem rate of 12.4% for PSA 10, underscoring its appeal among those seeking high-quality cards from the early Pokémon trading card game era.