Tapu Koko #SM30a from SM Black Star Promos is a reverse holo promo card that currently sells for about $5.81 ungraded, with graded copies ranging from $10.50 at grade 9 to $12.00 at grade 9.5. A grade 9.5 copy sells for around $12.00, about 2.1× the $5.81 raw price, so high-grade copies are worth grading.