Ash-Greninja-EX #XY133 from XY Black Star Promos is a reverse holo promo card that currently sells for about $25.47 ungraded, with graded copies ranging from $170 at grade 7 to $49,000 at grade 10. TCGrader's AI has graded 25 copies of Ash-Greninja-EX (XY Black Star Promos), averaging 7.8 overall. Only 16% scored 9 or higher, so genuinely mint copies of this card are scarce. A grade 10 copy sells for around $49,000, about 1924× the $25.47 raw price, so high-grade copies are worth grading.