Cheapest priced copy (Mirrodin): $0.35 at Card Kingdom, near mint, their price list as of .
Neurok Familiar 
Creature — Bird · 1/1 · Common · Mirrodin · #43
Flying
When this creature enters, reveal the top card of your library. If it's an artifact card, put it into your hand. Otherwise, put it into your graveyard.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin | 43 | Common | $0.35 | $0.49 |