Bronzong #SWSH091 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $5.40 ungraded, with graded copies ranging from $24.08 at grade 9 to $100 at grade 10. A grade 10 copy sells for around $100, about 19× the $5.40 raw price, so high-grade copies are worth grading.