I just bought a 91' S13, 5 Speed - this car is in perfect condition in and out. It is black outside/charcoal indside, Power windows/locks, Cruise control, Sun Roof, Cold AC. It has only had one owner, has been garage kept, has obviously been babied and has 81,000 original miles on it. I originally bought this car to drive until a friend told me it had more value to someone wanting to build it. I know nothing about these cars and what makes them more or less valuable. What else do I need to know to determine whether I should sell it or not and If I do, how much to ask for it?