Blaziken-EX #XY54 from XY Black Star Promos is a reverse holo promo card that currently sells for about $4.62 ungraded, with graded copies ranging from $6.00 at grade 7 to $300 at grade 10. A grade 10 copy sells for around $300, about 65× the $4.62 raw price, so high-grade copies are worth grading.