Nice one Jules! As Mark Twain once said "The reports of your death have been greatly exaggerated".
Rule number one is "Demand must always exceed supply". Make 5000 cars and only 4000 people want it, then it probably wont appreciate. Make 5000 cars and 15000 people want it, it will go up in value. Make 1 car and no one wants it, then it probably wont appreciate in value.
cheers
dr fabio