Cheapest priced copy (Ninth Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Wanderguard Sentry 
Creature — Drone · 3/3 · Common · Mirrodin · #56
When this creature enters, look at target opponent's hand.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ninth Edition | 111 | Common | $0.35 | — |
| Ninth Edition | 111★ | Common | — | $0.49 |
| Mirrodin | 56 | Common | $0.35 | $0.49 |