Anti Potion Potion Player Stamped value

The Anti Potion Potion Player Stamped (Caster's Cup Promo Cards) is listed with a used value of $9999 [1]. This high value suggests it is a rare or highly sought-after promotional card within the MetaZoo Card Value set. To get a more detailed understanding of what drives this price, such as condition tiers or current live asking prices, I would need the specific item slug.