Cheapest priced copy (Avacyn Restored): $0.35 at Card Kingdom, near mint, their price list as of .
Barter in Blood 
Sorcery · Uncommon · Avacyn Restored · #85
Each player sacrifices two creatures of their choice.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
9 printings · $0.35 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avacyn Restored | 85 | Uncommon | $0.35 | $0.49 |
| Commander 2015 | 115 | Uncommon | $0.35 | — |
| Commander Anthology | 48 | Uncommon | $0.35 | — |
| Duel Decks: Divine vs. Demonic | 52 | Uncommon | $0.35 | — |
| Duel Decks: Blessed vs. Cursed | 52 | Uncommon | $0.35 | — |
| Duel Decks Anthology: Divine vs. Demonic | 52 | Uncommon | $0.35 | — |
| Jumpstart | 202 | Uncommon | $0.35 | — |
| Mirrodin | 57 | Uncommon | $0.35 | $1.49 |
| The List | MRD-57 | Uncommon | $0.35 | — |
3 rulings from Wizards of the Coast
- 1 May 2012If a player controls only one creature, that creature is sacrificed.
- 1 May 2012The active player chooses which creatures will be sacrificed first, then each other player in turn order does the same. Then all creatures are sacrificed simultaneously.
- 1 May 2012Barter in Blood doesn’t target any creatures and may be cast even if a player controls fewer than two creatures.