Zygarde-GX #SM122 from SM Black Star Promos is a reverse holo promo card that currently sells for about $10.00 ungraded, with graded copies ranging from $83.00 at grade 9 to $87.61 at grade 10. A grade 10 copy sells for around $87.61, about 8.8× the $10.00 raw price, so high-grade copies are worth grading.