Question: what questions to ask when buying a car off craigslist?
Answer: Assume that the person selling the car is a con artist (unless it's a licensed dealer). ... 
Meet the seller at a public place and bring a friend. ... 
Ask why they're selling, and ask for records. ... 
Insist on a test drive, but get ID, registration, and proof of insurance first. ... 
Know what the car is worth (as best you can).