Rayquaza-EX #BW47 from BW Black Star Promos is a reverse holo promo card that currently sells for about $13.22 ungraded, with graded copies ranging from $22.86 at grade 7 to $4,059 at grade 10. A grade 10 copy sells for around $4,059, about 307× the $13.22 raw price, so high-grade copies are worth grading.