This is a PA/NJ resident. It is my personal opinion that this person is a Craigslist scam artist. He attempts to get your personal info by pretending to be interested in the item you're selling. He became frustrated and insulting when I didn't give-in to his requests.
I have no proof, but he may be responsible for sending multiple harassing messages under several spoof email accounts. I recommend that you Do Not give this person your cell phone number.