Pikachu-EX #XY124 from XY Black Star Promos is a reverse holo promo card that currently sells for about $227 ungraded, with graded copies ranging from $501 at grade 7 to $8,500 at grade 10. TCGrader's AI has graded 43 copies of Pikachu-EX (XY Black Star Promos), averaging 7.9 overall. Only 2% scored 9 or higher, so genuinely mint copies of this card are scarce. A grade 10 copy sells for around $8,500, about 38× the $227 raw price, so high-grade copies are worth grading.