Alakazam ex #50 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $2.19 ungraded, with graded copies ranging from $7.33 at grade 7 to $43.00 at grade 10. A grade 10 copy sells for around $43.00, about 20× the $2.19 raw price, so high-grade copies are worth grading.