Brock's Pewter City Gym #54 from Hidden Fates is a reverse holo uncommon card that currently sells for about $0.09 ungraded, with graded copies ranging from $10.28 at grade 9 to $23.50 at grade 10. A grade 10 copy sells for around $23.50, about 261× the $0.09 raw price, so high-grade copies are worth grading.