Cheapest priced copy (Pro Tour Collector Set): $0.79 at Card Kingdom, near mint, their price list as of .
Aeolipile 
Artifact · Rare · Pro Tour Collector Set · #pp81
{1}, {T}, Sacrifice this artifact: It deals 2 damage to any target.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
3 printings · $0.79 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fallen Empires | 81 | Rare | $3.49 | — |
| Pro Tour Collector Set | ml81sb | Rare | $0.79 | — |
| Pro Tour Collector Set | pp81 | Rare | $1.29 | — |