Swellow #72 from Roaring Skies is a holo holo_rare card that currently sells for about $1.99 ungraded, with graded copies ranging from $9.50 at grade 7 to $44.07 at grade 10. A grade 10 copy sells for around $44.07, about 22× the $1.99 raw price, so high-grade copies are worth grading.