Zapdos #23 from Roaring Skies is a reverse holo rare card that currently sells for about $1.40 ungraded, with graded copies ranging from $8.00 at grade 7 to $51.00 at grade 10. A grade 10 copy sells for around $51.00, about 36× the $1.40 raw price, so high-grade copies are worth grading.