Psyduck #SM199 from SM Black Star Promos is a reverse holo promo card that currently sells for about $5.13 ungraded, with graded copies ranging from $24.24 at grade 9 to $98.00 at grade 10. A grade 10 copy sells for around $98.00, about 19× the $5.13 raw price, so high-grade copies are worth grading.