Gyarados-GX #18 from Crimson Invasion is a holo holo_rare card that currently sells for about $19.33 ungraded, with graded copies ranging from $14.17 at grade 7 to $800 at grade 10. TCGrader's AI has graded 4 copies of Gyarados-GX (Crimson Invasion), averaging 8 overall. A grade 10 copy sells for around $800, about 41× the $19.33 raw price, so high-grade copies are worth grading.