Koga's Pidgeotto #27 from Gym Challenge is a rare card that currently sells for about $10.56 ungraded, with graded copies ranging from $20.00 at grade 7 to $38.09 at grade 10. A grade 10 copy sells for around $38.09, about 3.6× the $10.56 raw price, so high-grade copies are worth grading.