Mudkip #57 from Crystal Guardians is a common card that currently sells for about $3.14 ungraded, with graded copies ranging from $24.00 at grade 7 to $126 at grade 10. TCGrader's AI has graded 6 copies of Mudkip (Crystal Guardians), averaging 9 overall. 100% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $126, about 40× the $3.14 raw price, so high-grade copies are worth grading.