Dark Blastoise #20 from Team Rocket is a 1st edition holo rare card that currently sells for about $41.84 ungraded, with graded copies ranging from $62.00 at grade 7 to $199 at grade 10. TCGrader's AI has graded 8 copies of Dark Blastoise (Team Rocket), averaging 8 overall. 38% scored 9 or higher, so a strong copy is achievable but far from guaranteed. A grade 10 copy sells for around $199, about 4.8× the $41.84 raw price, so high-grade copies are worth grading.