Walking Wake ex #127 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $1.10 ungraded, with graded copies ranging from $11.57 at grade 9 to $29.99 at grade 10. A grade 10 copy sells for around $29.99, about 27× the $1.10 raw price, so high-grade copies are worth grading.