Enduring Vitality #404 from Duskmourn: House of Horror is a showcase foil mythic card that currently sells for about $273 ungraded, with graded copies ranging from $80.00 at grade 9 to $88.00 at grade 9.5. A grade 9.5 copy sells for around $88.00 vs $273 raw. That's a modest premium, so grading only pays off for near-perfect copies.