Cheapest priced copy (Shards of Alara): $0.35 at Card Kingdom, near mint, their price list as of .
Protomatter Powder 
Artifact · Uncommon · Shards of Alara · #53
{4}{W}, {T}, Sacrifice this artifact: Return target artifact card from your graveyard to the battlefield.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Shards of Alara | 53 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 1 October 2008The only difference between a colored artifact and a colorless artifact is, obviously, its color. Unlike most artifacts, a colored artifact requires colored mana to cast. Also unlike most artifacts, a colored artifact has a color in all zones. It will interact with cards that care about color. Other than that, a colored artifact behaves just like any other artifact. It will interact as normal with any card that cares about artifacts, such as Shatter or Arcbound Ravager.
- 1 October 2008You can’t sacrifice Protomatter Powder to return itself to the battlefield. First you choose the target (at which time it’s still on the battlefield), then you pay the costs (at which time you sacrifice it).