Cheapest priced copy (Scars of Mirrodin): $0.35 at Card Kingdom, near mint, their price list as of .
Lifesmith 
Creature — Human Artificer · 2/1 · Uncommon · Scars of Mirrodin · #124
Whenever you cast an artifact spell, you may pay {1}. If you do, you gain 3 life.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Scars of Mirrodin | 124 | Uncommon | $0.35 | $0.49 |