Grass Energy #115 from HeartGold & SoulSilver is a reverse holo common card that currently sells for about $15.01 ungraded, with graded copies ranging from $19.94 at grade 7 to $22.00 at grade 9.5. A grade 9.5 copy sells for around $22.00 vs $15.01 raw. That's a modest premium, so grading only pays off for near-perfect copies.