Would a private citizen rent a $300,000 car if it was his own? What kind of insurance would he have to carry? Presumably, somebody would have noticed that the guy renting the car -- he had to have a driver's license in addition to the stolen credit card, right? -- was a teenager.
Incredible malfeasance on somebody's part.
If it was an "exotic car rentals" business that rented the car it makes it that much worse.