Cheapest priced copy (March of the Machine): $0.35 at Card Kingdom, near mint, their price list as of .
Kor Halberd 
Artifact — Equipment · Common · March of the Machine · #27
Equipped creature gets +1/+1 and has vigilance.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine | 27 | Common | $0.35 | $0.49 |