The title of the car is the crucial thing that you must have. Whether you are preparing questions to ask when buying a used car from a dealership or a private seller, owning the title is the most important thing. No title means no deal. If a dealer or a private seller is unable to provide you with one, walk away. However, if the seller provides you with the title, have it inspected carefully before finalizing the deal. The title will tell you everything you need to know about a car and will affect your negotiation.