Charizard-EX #XY121 from XY Black Star Promos is a reverse holo promo card that currently sells for about $118 ungraded, with graded copies ranging from $177 at grade 7 to $6,900 at grade 10. TCGrader's AI has graded 25 copies of Charizard-EX (XY Black Star Promos), averaging 7.7 overall. Only 12% scored 9 or higher, so genuinely mint copies of this card are scarce. A grade 10 copy sells for around $6,900, about 59× the $118 raw price, so high-grade copies are worth grading.