The One Ring #451 from The Lord of the Rings: Tales of Middle-earth is a full art foil / borderless mythic card that currently sells for about $2,000,000 ungraded, with graded copies ranging from $15,000 at grade 9.5 to $19,149 at grade 10. A grade 10 copy sells for around $19,149 vs $2,000,000 raw. That's a modest premium, so grading only pays off for near-perfect copies.