Cheapest priced copy (Teenage Mutant Ninja Turtles): $0.35 at Card Kingdom, near mint, their price list as of .
Baxter Stockman 
Legendary Creature — Human Scientist · 3/3 · Uncommon · Teenage Mutant Ninja Turtles · #139
When Baxter Stockman enters, create a 1/1 colorless Robot artifact creature token.
At the beginning of combat on your turn, target artifact creature you control gets +3/+0 and gains first strike and vigilance until end of turn.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Teenage Mutant Ninja Turtles | 139 | Uncommon | $0.35 | $0.49 |