Snapcaster Mage #71 from Ultimate Masters is a mythic card that currently sells for about $21.63 ungraded, with graded copies ranging from $77.00 at grade 9 to $22.53 at grade 10. A grade 10 copy sells for around $22.53 vs $21.63 raw. That's a modest premium, so grading only pays off for near-perfect copies.