Mimikyu δ #SWSH136 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $10.54 ungraded, with graded copies ranging from $12.79 at grade 7 to $213 at grade 10. A grade 10 copy sells for around $213, about 20× the $10.54 raw price, so high-grade copies are worth grading.