Cheapest priced copy (Mirrodin Besieged): $0.35 at Card Kingdom, near mint, their price list as of .
Mirran Spy 
Creature — Drone · 1/3 · Common · Mirrodin Besieged · #26
Flying
Whenever you cast an artifact spell, you may untap target creature.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin Besieged | 26 | Common | $0.35 | $4.49 |