Yes you need a PA license to propagate(breed) any reptile that you are going to sell. It's cheap and easy to get. Here's the contact info:
Commonwealth Of Pennsylvania
Department Of Agriculture Bureau Of Animal Health And Diagnostic Services
2301 North Cameron Street
Harrisburg, PA 17110-9408
(717) 783-9550
Just give them a call and they will give you all the info you need.
here's a link to the application you need.
http://www.agriculture.state.pa.us/p...=0&formid=214&