Ditto #XY40 from XY Black Star Promos is a reverse holo promo card that currently sells for about $67.02 ungraded, with graded copies ranging from $49.99 at grade 7 to $600 at grade 10. TCGrader's AI has graded 5 copies of Ditto (XY Black Star Promos), averaging 8.2 overall. Only 20% scored 9 or higher, so genuinely mint copies of this card are scarce. A grade 10 copy sells for around $600, about 9× the $67.02 raw price, so high-grade copies are worth grading.