Donphan #107 from HeartGold & SoulSilver is a rare card that currently sells for about $10.79 ungraded, with graded copies ranging from $16.76 at grade 7 to $29.99 at grade 10. A grade 10 copy sells for around $29.99, about 2.8× the $10.79 raw price, so high-grade copies are worth grading.