Which Dark Metal Energy do you have?
Same name, 55× the price: $2.23 to $122 raw. The difference is printed on the card — it is just not somewhere most people think to look.
PCG-P Promos · #054
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.
$122
48% gem
Movie Commemoration VS Pack Aura's Lucario · #020
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.
$11
38% gem
Team Rocket Returns · #94
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.
$4.38
28% gem
Holon Phantoms · #97
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.
$2.23
14% 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.