Lumra, Bellow of the Woods #183 from Bloomburrow is a foil mythic card that currently sells for about $47.45 ungraded, with graded copies ranging from $59.99 at grade 9 to $70.00 at grade 10. A grade 10 copy sells for around $70.00 vs $47.45 raw. That's a modest premium, so grading only pays off for near-perfect copies.