Gyarados #123 from HeartGold & SoulSilver is a holo holo_rare card that currently sells for about $122 ungraded, with graded copies ranging from $494 at grade 7 to $6,700 at grade 10. TCGrader's AI has graded 4 copies of Gyarados (HeartGold & SoulSilver), averaging 6.4 overall. A grade 10 copy sells for around $6,700, about 55× the $122 raw price, so high-grade copies are worth grading.