Light Toxtricity #SWSH137 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $6.97 ungraded, with graded copies ranging from $11.00 at grade 7 to $2,640 at grade 10. TCGrader's AI has graded 3 copies of Light Toxtricity (SWSH Black Star Promos), averaging 8 overall. 33% scored 9 or higher, so a strong copy is achievable but far from guaranteed. A grade 10 copy sells for around $2,640, about 379× the $6.97 raw price, so high-grade copies are worth grading.