Chimchar #DP02 from DP Black Star Promos is a reverse holo promo card that currently sells for about $6.45 ungraded, with graded copies ranging from $19.99 at grade 7 to $1,200 at grade 10. A grade 10 copy sells for around $1,200, about 186× the $6.45 raw price, so high-grade copies are worth grading.