Dark Gyarados #8 from Celebrations: Classic Collection is a reverse holo common card that currently sells for about $5.03 ungraded, with graded copies ranging from $10.00 at grade 7 to $85.00 at grade 10. A grade 10 copy sells for around $85.00, about 17× the $5.03 raw price, so high-grade copies are worth grading.