Cheapest priced copy (Kaladesh): $0.35 at Card Kingdom, near mint, their price list as of .
Cogworker's Puzzleknot 
Artifact · Common · Kaladesh · #201
When this artifact enters, create a 1/1 colorless Servo artifact creature token.
{1}{W}, Sacrifice this artifact: Create a 1/1 colorless Servo artifact creature token.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Kaladesh | 201 | Common | $0.35 | $0.49 |