Ditto #18 from Fossil is a rare card that currently sells for about $6.25 ungraded, with graded copies ranging from $29.00 at grade 7 to $850 at grade 10. TCGrader's AI has graded 4 copies of Ditto (Fossil), averaging 6.8 overall. Only 25% scored 9 or higher, so genuinely mint copies of this card are scarce. A grade 10 copy sells for around $850, about 136× the $6.25 raw price, so high-grade copies are worth grading.