Locally there have been people busted at flea markets or on the boardwalk in NJ selling baby turtles but all of those were due to local regulations (for example, NJ prohibits the sale of any chelonian (regardless of size within the state) but locally stores that have sold them typically have that warning posted. Oddly enough most local shops that do sell baby turtles aren't usually pandering to the cheap baby turtle market but to the more upper end market with animals like baby greek or herman's tortoises.

Ed