Cheapest priced copy (March of the Machine Commander): $0.69 at Card Kingdom, near mint, their price list as of .
Vulpine Harvester 
Creature — Phyrexian Fox · 3/3 · Rare · March of the Machine Commander · #106
Whenever one or more Phyrexians you control attack, return target artifact card from your graveyard to the battlefield if its mana value is less than or equal to their total power.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.69 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine Commander | 19 | Rare | $0.69 | — |
| March of the Machine Commander | 106 | Rare | $0.79 | — |
One ruling from Wizards of the Coast
- 14 April 2023You may choose any artifact card in your graveyard as the target of Vulpine Harvester’s triggered ability. The total power of the attacking Phyrexians is checked as the ability resolves to determine if that card is returned to the battlefield or not. Use the power of each of those creatures at that time, even if the creature is no longer attacking or no longer a Phyrexian. If the creature isn’t on the battlefield, use its power from when it was last on the battlefield. If the artifact card’s mana value is greater than the total power, it stays in your graveyard.