Cheapest priced copy (Marvel Super Heroes): $0.35 at Card Kingdom, near mint, their price list as of .
Ultron Drone 
Artifact Creature — Robot Villain · 2/3 · Common · Marvel Super Heroes · #253
Power-up — {6}: Put two +1/+1 counters on this creature and create a 2/2 colorless Robot Villain artifact creature token. (Activate each power-up ability only once. Reduce the cost by its mana cost if it entered this turn.)
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1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Marvel Super Heroes | 253 | Common | $0.35 | $0.49 |