Steelix #150 from Mega Evolution is a holo illustration_rare card that currently sells for about $6.89 ungraded, with graded copies ranging from $10.00 at grade 7 to $50.00 at grade 10. A grade 10 copy sells for around $50.00, about 7.3× the $6.89 raw price, so high-grade copies are worth grading.