Cheapest priced copy (Duel Decks: Speed vs. Cunning): $0.35 at Card Kingdom, near mint, their price list as of .
Coral Trickster 
Creature — Merfolk Rogue · 2/1 · Common · Time Spiral · #54
Morph {U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When this creature is turned face up, you may tap or untap target permanent.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
4 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Speed vs. Cunning | 44 | Common | $0.35 | — |
| The List | DDN-44 | Common | $0.35 | — |
| Time Spiral | 54 | Common | $0.35 | $0.49 |
| Time Spiral Remastered | 58 | Common | $0.35 | $0.49 |