Unemployed air conditioning guy running his same old scam. Your best bet.... Have him do the repairs or equipment replacement. Don't pay him. Record your transaction if you can. Report him to your city's permitting and licensing department. They know who he is but have been unable to catch him. He is not licensed, has no refrigeration card to handle refrigerant and has no insurance. He is very personable but has a history of taking the money and running.