Treecko #3 from Nintendo Black Star Promos is a reverse holo promo card that currently sells for about $4.16 ungraded, with graded copies ranging from $5.00 at grade 7 to $75.00 at grade 10. A grade 10 copy sells for around $75.00, about 18× the $4.16 raw price, so high-grade copies are worth grading.