Acerola's Mischief #165 from Mega Evolution is a ultra_rare card that currently sells for about $2.86 ungraded, with graded copies ranging from $9.00 at grade 7 to $42.00 at grade 10. A grade 10 copy sells for around $42.00, about 15× the $2.86 raw price, so high-grade copies are worth grading.