Cheapest priced copy (Wilds of Eldraine): $0.39 at Card Kingdom, near mint, their price list as of .
Snaremaster Sprite 
Creature — Faerie Wizard · 1/1 · Common · Wilds of Eldraine · #68
Flying
When this creature enters, you may pay {2}. When you do, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.39 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Wilds of Eldraine | 68 | Common | $0.39 | $0.49 |
2 rulings from Wizards of the Coast
- 1 September 2023You may target a creature that is already tapped with the reflexive triggered ability. If the target creature is already tapped as the ability resolves, you will still put a stun counter on it.
- 1 September 2023You don't choose a target for Snaremaster Sprite's ability at the time it triggers. Rather, a second "reflexive" ability triggers when you pay {2} this way. You choose a target for that ability as it goes on the stack. Each player may respond to this triggered ability as normal.