Scalding Tarn #254 from Modern Horizons 2 is a rare card that currently sells for about $36.62 ungraded, with graded copies ranging from $74.74 at grade 7 to $30.89 at grade 10. A grade 10 copy sells for around $30.89 vs $36.62 raw. That's a modest premium, so grading only pays off for near-perfect copies.