Nidoran ♂ #83 from Base Set 2 is a common card that currently sells for about $0.99 ungraded, with graded copies ranging from $5.00 at grade 7 to $39.99 at grade 10. A grade 10 copy sells for around $39.99, about 40× the $0.99 raw price, so high-grade copies are worth grading.