The Great Henge #370 from Throne of Eldraine is a extended art foil mythic card that currently sells for about $58.86 ungraded, with graded copies ranging from $93.00 at grade 9 to $42.00 at grade 10. A grade 10 copy sells for around $42.00 vs $58.86 raw. That's a modest premium, so grading only pays off for near-perfect copies.