Wan Shi Tong, Librarian #320 from Avatar: The Last Airbender is a full art / borderless mythic card that currently sells for about $104 ungraded, with graded copies ranging from $90.00 at grade 9 to $172 at grade 10. A grade 10 copy sells for around $172 vs $104 raw. That's a modest premium, so grading only pays off for near-perfect copies.