Vaporeon #SWSH072 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $6.75 ungraded, with graded copies ranging from $14.97 at grade 7 to $478 at grade 10. A grade 10 copy sells for around $478, about 71× the $6.75 raw price, so high-grade copies are worth grading.