Cheapest priced copy (Avatar: The Last Airbender): $0.49 at Card Kingdom, near mint, their price list as of .
Diligent Zookeeper 
Creature — Human Citizen Ally · 4/4 · Rare · Avatar: The Last Airbender · #171
Each non-Human creature you control gets +1/+1 for each of its creature types, to a maximum of 10.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $0.49 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avatar: The Last Airbender Promos | 171s | Rare | — | $2.99 |
| Avatar: The Last Airbender | 171 | Rare | $0.49 | $0.49 |
| Avatar: The Last Airbender | 327 | Rare | $0.49 | $0.49 |