Which Armored Mewtwo do you have?

Same name, 2× the price: $66 to $121 raw. The difference is printed on the card — it is just not somewhere most people think to look.

Sun & Moon Black Star Promo · #SM228 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. $121 4.5% gem SM-P Promos · #365 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. $66 27% 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.