Cheapest priced copy (Throne of Eldraine): $0.35 at Card Kingdom, near mint, their price list as of .
Weapon Rack 
Artifact · Common · Jumpstart 2022 · #807
This artifact enters with three +1/+1 counters on it.
{T}: Move a +1/+1 counter from this artifact onto target creature. Activate only as a sorcery.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Throne of Eldraine | 236 | Common | $0.35 | $0.49 |
| Jumpstart 2022 | 807 | Common | $0.35 | — |
3 rulings from Wizards of the Coast
- 4 October 2019The +1/+1 counters on Weapon Rack won't affect it unless it somehow becomes a creature.
- 4 October 2019Once Weapon Rack runs out of +1/+1 counters, it remains on the battlefield. You can activate its last ability, but it won't do anything.
- 4 October 2019If Weapon Rack has left the battlefield or has no +1/+1 counters on it by the time its activated ability resolves, you won't put a +1/+1 counter on the target creature. If the creature becomes an illegal target or can't have a +1/+1 counter put onto it for some other reason, you won't remove a +1/+1 counter from Weapon Rack.