Jeweled Lotus #1066 from Commander Masters is a full art foil / borderless mythic card that currently sells for about $600 ungraded, with graded copies ranging from $536 at grade 9 to $91.00 at grade 10. A grade 10 copy sells for around $91.00 vs $600 raw. That's a modest premium, so grading only pays off for near-perfect copies.