Cheapest priced copy (Commander 2013): $0.35 at Card Kingdom, near mint, their price list as of .
Razor Hippogriff 
Creature — Hippogriff · 3/3 · Uncommon · Scars of Mirrodin · #17
Flying
When this creature enters, return target artifact card from your graveyard to your hand. You gain life equal to that card's mana value.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2013 | 19 | Uncommon | $0.35 | — |
| Scars of Mirrodin | 17 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 1 January 2011If the mana cost of the targeted card includes {X}, X is considered to be 0.
- 1 January 2011If the artifact card in your graveyard is an illegal target by the time the ability resolves, the ability won’t resolve. You won’t gain any life.