Cheapest priced copy (Double Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Surge Node 
Artifact · Uncommon · New Phyrexia · #160
This artifact enters with six charge counters on it.
{1}, {T}, Remove a charge counter from this artifact: Put a charge counter on target artifact.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $6.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 294 | Common | $0.35 | $0.49 |
| New Phyrexia | 160 | Uncommon | $0.35 | $6.99 |
2 rulings from Wizards of the Coast
- 7 August 2020Surge Node can be the target of its own activated ability. Because it doesn't “move” a counter, the ability will remove a counter from Surge Node and then put one onto it.
- 7 August 2020Once Surge Node has run out of charge counters, it remains on the battlefield.