Cheapest priced copy (Avacyn Restored): $0.35 at Card Kingdom, near mint, their price list as of .
Marrow Bats 
Creature — Bat Skeleton · 4/1 · Uncommon · Commander 2013 · #82
Flying
Pay 4 life: Regenerate this creature.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $0.59 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avacyn Restored | 113 | Uncommon | $0.35 | $0.49 |
| Commander 2013 | 82 | Uncommon | $0.59 | — |