Cheapest priced copy (World Championship Decks 2004): $0.49 at Card Kingdom, near mint, their price list as of .
Myr Incubator 
Artifact · Rare · Mirrodin · #212
{6}, {T}, Sacrifice this artifact: Search your library for any number of artifact cards, exile them, then create that many 1/1 colorless Myr artifact creature tokens. Then shuffle.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.49 to $5.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin | 212 | Rare | $1.29 | $5.99 |
| World Championship Decks 2004 | mb212 | Rare | $0.49 | — |