Chien-Pao #152 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $5.80 ungraded, with graded copies ranging from $6.50 at grade 7 to $95.00 at grade 10. A grade 10 copy sells for around $95.00, about 16× the $5.80 raw price, so high-grade copies are worth grading.