Iono #124 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $16.93 ungraded, with graded copies ranging from $20.43 at grade 9 to $81.00 at grade 10. A grade 10 copy sells for around $81.00, about 4.8× the $16.93 raw price, so high-grade copies are worth grading.