Which Decidueye GX do you have?
Same name, 19× the price: $0.99 to $19 raw. The difference is printed on the card — it is just not somewhere most people think to look.
Hidden Fates · #SV47
Check the set symbol in the lower right of the illustration, and the copyright year along the bottom edge. Those two identify the print run on every card that has them.
$19
60% gem
GX Ultra Shiny · #207
Check the set symbol in the lower right of the illustration, and the copyright year along the bottom edge. Those two identify the print run on every card that has them.
$13
65% gem
Strength Expansion Pack Sun & Moon · #003
Check the set symbol in the lower right of the illustration, and the copyright year along the bottom edge. Those two identify the print run on every card that has them.
$6.10
71% gem
Sun & Moon Black Star Promo · #SM37
Check the set symbol in the lower right of the illustration, and the copyright year along the bottom edge. Those two identify the print run on every card that has them.
$4.30
16% gem
Sun & Moon Starter Set · #004
Check the set symbol in the lower right of the illustration, and the copyright year along the bottom edge. Those two identify the print run on every card that has them.
$3.49
62% gem
Sun & Moon · #12
Check the set symbol in the lower right of the illustration, and the copyright year along the bottom edge. Those two identify the print run on every card that has them.
$3.43
39% gem
Strength Expansion Pack Sun & Moon · #059
Check the set symbol in the lower right of the illustration, and the copyright year along the bottom edge. Those two identify the print run on every card that has them.
$0.99
48% gem
Strength Expansion Pack Sun & Moon · #052
Check the set symbol in the lower right of the illustration, and the copyright year along the bottom edge. Those two identify the print run on every card that has them.
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87% gem
We have no hand-checked note for these printings yet, so the guidance above is the general rule rather than something specific to this card.
Prices are raw market value. Click a printing for its full grading verdict — the gem rate, the fees and whether it beats selling raw.