Lugia V #138 from Silver Tempest is a reverse holo holo_rare card that currently sells for about $9.99 ungraded, with graded copies ranging from $11.01 at grade 7 to $18.50 at grade 10. A grade 10 copy sells for around $18.50 vs $9.99 raw. That's a modest premium, so grading only pays off for near-perfect copies.