Mew #1 from Southern Islands is a common card that currently sells for about $387 ungraded, with graded copies ranging from $750 at grade 7 to $90,000 at grade 10. TCGrader's AI has graded 8 copies of Mew (Southern Islands), averaging 7.1 overall. A grade 10 copy sells for around $90,000, about 233× the $387 raw price, so high-grade copies are worth grading.