Cheapest priced copy (Avatar: The Last Airbender Eternal): $5.49 at Card Kingdom, near mint, their price list as of .
Tale of Katara and Toph 
Enchantment · Rare · Avatar: The Last Airbender Eternal · #207
Creatures you control have "Whenever this creature becomes tapped for the first time during each of your turns, put a +1/+1 counter on it."
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $4.49 to $5.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avatar: The Last Airbender Eternal | 143 | Rare | $5.49 | $4.49 |
| Avatar: The Last Airbender Eternal | 207 | Rare | $5.99 | $4.99 |