Originally Posted by Donald C

They are on the protected species list, requiring a USFW Interstate Commerce Permit to purchase and transport across state lines. You do not need this permit to buy from a breeder living in your state. The permit process usually takes 60 to 90 days to be issued, and the permit application has to be filed with a $100 application fee.

As the price of the animals is really not that much, so most vendors simply sell within their state and not across state lines.