Cheapest priced copy (Avacyn Restored): $0.35 at Card Kingdom, near mint, their price list as of .
Grave Exchange 
Sorcery · Common · Avacyn Restored · #105
Return target creature card from your graveyard to your hand. Target player sacrifices a creature of their choice.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avacyn Restored | 105 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 1 May 2012If both targets are illegal when Grave Exchange tries to resolve, it won’t resolve and none of its effects will happen. If only one target is legal, the effect relevant to that target will happen and the other will not.
- 1 May 2012Grave Exchange targets both a creature card in your graveyard and a player. You can’t cast it unless there is a legal target to choose for both. You can target a player who controls no creatures.