Blastoise-EX #XY122 from XY Black Star Promos is a reverse holo promo card that currently sells for about $165 ungraded, with graded copies ranging from $270 at grade 7 to $10,800 at grade 10. TCGrader's AI has graded 14 copies of Blastoise-EX (XY Black Star Promos), averaging 7.8 overall. A grade 10 copy sells for around $10,800, about 66× the $165 raw price, so high-grade copies are worth grading.