Pikachu V-UNION #SWSH142 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $5.99 ungraded, with graded copies ranging from $3.25 at grade 7 to $167 at grade 10. A grade 10 copy sells for around $167, about 28× the $5.99 raw price, so high-grade copies are worth grading.