Tentacool #56 from Fossil is a common card that currently sells for about $1.73 ungraded, with graded copies ranging from $10.50 at grade 7 to $123 at grade 10. TCGrader's AI has graded 4 copies of Tentacool (Fossil), averaging 8 overall. A grade 10 copy sells for around $123, about 71× the $1.73 raw price, so high-grade copies are worth grading.