Allosaurus Shepherd #28 from Jumpstart is a mythic card that currently sells for about $47.35 ungraded, with graded copies ranging from $39.95 at grade 9 to $29.36 at grade 10. A grade 10 copy sells for around $29.36 vs $47.35 raw. That's a modest premium, so grading only pays off for near-perfect copies.