Cheapest priced copy (Mirage): $0.35 at Card Kingdom, near mint, their price list as of .
Sewer Rats 
Creature — Rat · 1/1 · Common · Mirage · #139
{B}, Pay 1 life: This creature gets +1/+0 until end of turn. Activate no more than three times each turn.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Battle Royale Box Set | 70 | Common | $0.49 | — |
| Mirage | 139 | Common | $0.35 | — |