Mewtwo V-UNION #SWSH160 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $8.03 ungraded, with graded copies ranging from $12.00 at grade 9 to $99.99 at grade 10. A grade 10 copy sells for around $99.99, about 13× the $8.03 raw price, so high-grade copies are worth grading.