Blastoise-EX #21 from Evolutions is a holo holo_rare card that currently sells for about $5.32 ungraded, with graded copies ranging from $13.21 at grade 7 to $79.99 at grade 10. A grade 10 copy sells for around $79.99, about 15× the $5.32 raw price, so high-grade copies are worth grading.