Hello, I would like to buy a used Porsche. Unfortunately, the Porsche dealers do not have the car to my liking (colour, leather equipment, etc.). Now I have thought about looking for a Porsche about the private sale and then making the guarantee at a Porsche dealer. Now to the problems: How is this best to carry out or how can I get the guarantee from Porsche before I buy the car privately? Can someone help me?