Coalossal #SWSH024 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $6.36 ungraded, with graded copies ranging from $17.46 at grade 9 to $59.99 at grade 10. A grade 10 copy sells for around $59.99, about 9.4× the $6.36 raw price, so high-grade copies are worth grading.