Ashaya, Soul of the Wild #179 from Zendikar Rising is a mythic card that currently sells for about $26.99 ungraded, with graded copies ranging from $32.00 at grade 9 to $35.00 at grade 9.5. A grade 9.5 copy sells for around $35.00 vs $26.99 raw. That's a modest premium, so grading only pays off for near-perfect copies.