But if the car is in another city and you are unable to actually see it in person, test drive it and have a mechanic check it out before agreeing to buy it, then you know it's a scam
Craigslist is only for face to face transactions and as they say on every car page "Offers to ship vehicles are 100% fraudulent"
Maybe, if there are pictures of the interior then it's most likely owned by the seller. But if it's just some nappy pictures in a parking lot it might be a scam.