Porygon-Z #74 from Plasma Blast is a holo holo_rare card that currently sells for about $2.21 ungraded, with graded copies ranging from $29.27 at grade 9 to $47.92 at grade 10. A grade 10 copy sells for around $47.92, about 22× the $2.21 raw price, so high-grade copies are worth grading.