Giratina #SM151 from SM Black Star Promos is a reverse holo promo card that currently sells for about $15.68 ungraded, with graded copies ranging from $18.99 at grade 7 to $3,000 at grade 10. A grade 10 copy sells for around $3,000, about 191× the $15.68 raw price, so high-grade copies are worth grading.