Cheapest priced copy (Commander Legends: Battle for Baldur's Gate): $0.35 at Card Kingdom, near mint, their price list as of .
Dire Mimic 
Artifact — Treasure · Common · Commander Legends: Battle for Baldur's Gate · #310
Flash
{T}, Sacrifice this artifact: Add one mana of any color.
{3}: This artifact becomes a Shapeshifter artifact creature with base power and toughness 5/5 until end of turn.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends: Battle for Baldur's Gate | 310 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 10 June 2022Dire Mimic is still a Treasure after its last ability resolves, but Treasure is an artifact type, never a creature type.
- 10 June 2022If an effect refers to a Treasure, it means any Treasure artifact, not just a Treasure artifact token.