Gyarados #6 from Base Set is a holo rare card that currently sells for about $24.50 ungraded, with graded copies ranging from $42.00 at grade 7 to $3,000 at grade 10. TCGrader's AI has graded 26 copies of Gyarados (Base Set), averaging 6.5 overall. Only 4% scored 9 or higher, so genuinely mint copies of this card are scarce. A grade 10 copy sells for around $3,000, about 122× the $24.50 raw price, so high-grade copies are worth grading.