Pikachu #SWSH039 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $6.55 ungraded, with graded copies ranging from $13.00 at grade 7 to $355 at grade 10. TCGrader's AI has graded 6 copies of Pikachu (SWSH Black Star Promos), averaging 8.3 overall. 33% scored 9 or higher, so a strong copy is achievable but far from guaranteed. A grade 10 copy sells for around $355, about 54× the $6.55 raw price, so high-grade copies are worth grading.