What is the cheapest price I could find on a Jaguar XF?

At a police auction. But look for one from out of town. That way you won't get shot at by associates of the former owner to whom he owes money or the cops who know that the car is or was owned by a gangsta. Oh and get a red one if you can. Or a black XJ-R. Let me know.

Jaguars do depreciate alot, So you "might" find a 4 year old jag for about 1/3 of the original sticker price. Just be prepared to spend alot more for insurance (especially being a teenager) and any needed repairs and maintenance.