Elenda, the Dusk Rose #157 from Rivals of Ixalan is a mythic card that currently sells for about $6.34 ungraded, with graded copies ranging from $7.50 at grade 9 to $8.00 at grade 9.5. A grade 9.5 copy sells for around $8.00 vs $6.34 raw. That's a modest premium, so grading only pays off for near-perfect copies.