Zamazenta #SWSH034 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $4.20 ungraded, with graded copies ranging from $10.82 at grade 9 to $89.99 at grade 10. A grade 10 copy sells for around $89.99, about 21× the $4.20 raw price, so high-grade copies are worth grading.