Cheapest priced copy (Duel Decks: Merfolk vs. Goblins): $0.35 at Card Kingdom, near mint, their price list as of .
Foundry Street Denizen 
Creature — Goblin Warrior · 1/1 · Common · The List · #M15-141
Whenever another red creature you control enters, this creature gets +1/+0 until end of turn.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
4 printings · $0.35 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Merfolk vs. Goblins | 38 | Common | $0.35 | — |
| Gatecrash | 92 | Common | $0.35 | $0.99 |
| Magic 2015 | 141 | Common | $0.39 | $1.49 |
| The List | M15-141 | Common | $0.35 | — |