Cheapest priced copy (Avatar: The Last Airbender Eternal): $0.35 at Card Kingdom, near mint, their price list as of .
Stand United 
Instant · Common · Avatar: The Last Airbender Eternal · #149
Target creature gets +2/+2 until end of turn. If it's an Ally, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avatar: The Last Airbender Eternal | 149 | Common | $0.35 | $0.49 |