Cheapest priced copy (Mirrodin): $3.99 at Card Kingdom, near mint, their price list as of .
Power Conduit 
Artifact · Uncommon · Mirrodin · #229
{T}, Remove a counter from a permanent you control: Choose one —
• Put a charge counter on target artifact.
• Put a +1/+1 counter on target creature.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $3.99 to $22.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin | 229 | Uncommon | $3.99 | $22.99 |
| New Capenna Commander | 376 | Uncommon | $4.99 | — |
| The List | MRD-229 | Uncommon | $3.99 | — |