Cheapest priced copy (Core Set 2020): $0.49 at Card Kingdom, near mint, their price list as of .
Masterful Replication 
Instant · Rare · Core Set 2020 · #65
Choose one —
• Create two 3/3 colorless Golem artifact creature tokens.
• Choose target artifact you control. Each other artifact you control becomes a copy of that artifact until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2020 | 65 | Rare | $0.49 | $0.49 |
| March of the Machine Commander | 227 | Rare | $0.49 | — |
| Core Set 2020 Promos | 65p | Rare | $0.59 | $1.99 |
| Core Set 2020 Promos | 65s | Rare | — | $0.69 |
4 rulings from Wizards of the Coast
- 12 July 2019Becoming a copy won't change whether an artifact is a token.
- 12 July 2019If the target artifact is copying something else, then your artifacts become copies of whatever the target artifact copied.
- 12 July 2019An Equipment that becomes a copy of a creature becomes unattached if it was attached to a creature. An Equipment that becomes a copy of another Equipment remains attached if it was attached to a creature.
- 12 July 2019Masterful Replication copies the printed values of the target artifact. It won't copy counters on that artifact or effects that have changed its power, toughness, types, color, or so on. Notably, it won't copy effects that made the target artifact become an artifact creature if it isn't normally an artifact creature.