Phenax, God of Deception #152 from Born of the Gods is a foil mythic card that currently sells for about $25.28 ungraded, with graded copies ranging from $44.99 at grade 9 to $49.00 at grade 9.5. A grade 9.5 copy sells for around $49.00 vs $25.28 raw. That's a modest premium, so grading only pays off for near-perfect copies.