Giovanni's Nidoking #7 from Gym Challenge is a 1st edition holo holo_rare card that currently sells for about $118 ungraded, with graded copies ranging from $121 at grade 7 to $1,500 at grade 10. A grade 10 copy sells for around $1,500, about 13× the $118 raw price, so high-grade copies are worth grading.