Vampiric Tutor #156 from Commander Legends is a foil mythic card that currently sells for about $52.55 ungraded, with graded copies ranging from $44.99 at grade 9 to $73.16 at grade 10. A grade 10 copy sells for around $73.16 vs $52.55 raw. That's a modest premium, so grading only pays off for near-perfect copies.