Cheapest priced copy (Double Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Cogwork Assembler 
Artifact Creature — Assembly-Worker · 2/3 · Uncommon · Jumpstart 2022 · #761
{7}: Create a token that's a copy of target artifact. That token gains haste. Exile it at the beginning of the next end step.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 242 | Uncommon | $0.35 | $0.49 |
| Aether Revolt | 145 | Uncommon | $0.35 | $0.79 |
| Jumpstart 2022 | 761 | Uncommon | $0.35 | — |
5 rulings from Wizards of the Coast
- 9 February 2017If the copied artifact is copying something else (for example, if the copied artifact is a Sculpting Steel), then the token enters the battlefield as whatever that artifact copied.
- 9 February 2017If the copied artifact has {X} in its mana cost, X is considered to be 0.
- 9 February 2017The token copies exactly what was printed on the original artifact and nothing else (unless that artifact is copying something else or is a token; see below). It doesn't copy whether that artifact is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on.
- 9 February 2017Any enters-the-battlefield abilities of the copied artifact will trigger when the token enters the battlefield. Any “as [this artifact] enters the battlefield” or “[this artifact] enters the battlefield with” abilities of the chosen artifact will also work.
- 9 February 2017If the copied artifact is a token, the token created with Cogwork Assembler copies the original characteristics of that token as stated by the effect that that created that token.