Brock's Zubat #24 from Gym Heroes is a 1st edition rare card that currently sells for about $14.46 ungraded, with graded copies ranging from $12.00 at grade 7 to $73.00 at grade 10. A grade 10 copy sells for around $73.00, about 5× the $14.46 raw price, so high-grade copies are worth grading.