The condition of the rest of the interior is primarily personal preference. Whether or not you are willing to tolerate cracks in the dash, rips in the upholstery, or a broken radio is entirely your decision. It is always nice to find a car that is in good condition cosmetically as well as mechanically, but don’t let yourself be so dazzled by a beautiful car that you forget to inspect it thoroughly; you’ll be happier in the long run if you make sure you satisfy your own unique needs.