Phyrexian Tower #355 from Modern Horizons 3 is a full art foil / borderless mythic card that currently sells for about $83.27 ungraded, with graded copies ranging from $70.00 at grade 9 to $47.99 at grade 9.5. A grade 9.5 copy sells for around $47.99 vs $83.27 raw. That's a modest premium, so grading only pays off for near-perfect copies.