Cheapest priced copy (Duel Decks: Blessed vs. Cursed): $0.35 at Card Kingdom, near mint, their price list as of .
Elder Cathar 
Creature — Human Soldier · 2/2 · Common · Innistrad · #12
When this creature dies, put a +1/+1 counter on target creature you control. If that creature is a Human, put two +1/+1 counters on it instead.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Blessed vs. Cursed | 9 | Common | $0.35 | — |
| Innistrad | 12 | Common | $0.35 | $0.49 |