Acerola's Mischief #183 from Mega Evolution is a illustration_rare card that currently sells for about $32.50 ungraded, with graded copies ranging from $21.87 at grade 7 to $55.00 at grade 10. TCGrader's AI has graded 3 copies of Acerola's Mischief (Mega Evolution), averaging 8.2 overall. A grade 10 copy sells for around $55.00 vs $32.50 raw. That's a modest premium, so grading only pays off for near-perfect copies.