Greninja ★ #SWSH144 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $36.80 ungraded, with graded copies ranging from $30.00 at grade 7 to $1,944 at grade 10. TCGrader's AI has graded 34 copies of Greninja ★ (SWSH Black Star Promos), averaging 7.9 overall. Only 24% scored 9 or higher, so genuinely mint copies of this card are scarce. A grade 10 copy sells for around $1,944, about 53× the $36.80 raw price, so high-grade copies are worth grading.