Porygon-Z #7 from HS—Triumphant is a reverse holo holo_rare card that currently sells for about $4.95 ungraded, with graded copies ranging from $10.50 at grade 7 to $400 at grade 10. A grade 10 copy sells for around $400, about 81× the $4.95 raw price, so high-grade copies are worth grading.