Mew ex #88 from Celebrations: Classic Collection is a reverse holo common card that currently sells for about $15.18 ungraded, with graded copies ranging from $9.50 at grade 7 to $15.50 at grade 10. A grade 10 copy sells for around $15.50 vs $15.18 raw. That's a modest premium, so grading only pays off for near-perfect copies.