Koga's Muk #26 from Gym Challenge is a 1st edition rare card that currently sells for about $10.54 ungraded, with graded copies ranging from $9.53 at grade 7 to $75.00 at grade 10. A grade 10 copy sells for around $75.00, about 7.1× the $10.54 raw price, so high-grade copies are worth grading.