Teal Mask Ogerpon ex #166 from Scarlet & Violet Promos is a reverse holo promo card that currently sells for about $3.07 ungraded, with graded copies ranging from $6.00 at grade 7 to $23.50 at grade 10. A grade 10 copy sells for around $23.50, about 7.7× the $3.07 raw price, so high-grade copies are worth grading.