The Rocket's Training Gym #104 from Gym Heroes is a rare card that currently sells for about $11.25 ungraded, with graded copies ranging from $9.00 at grade 7 to $18.50 at grade 10. A grade 10 copy sells for around $18.50 vs $11.25 raw. That's a modest premium, so grading only pays off for near-perfect copies.