Mega Venusaur ex #155 from Mega Evolution is a ultra_rare card that currently sells for about $10.79 ungraded, with graded copies ranging from $16.28 at grade 7 to $81.00 at grade 10. TCGrader's AI has graded 3 copies of Mega Venusaur ex (Mega Evolution), averaging 8.3 overall. A grade 10 copy sells for around $81.00, about 7.5× the $10.79 raw price, so high-grade copies are worth grading.