Brock's Ninetales #3 from Gym Challenge is a unlimited holo holo_rare card that currently sells for about $19.99 ungraded, with graded copies ranging from $16.50 at grade 7 to $210 at grade 10. A grade 10 copy sells for around $210, about 11× the $19.99 raw price, so high-grade copies are worth grading.