You need to try the car out for suitability, entrance into the car, driving position, Vision, Reliability, service costs, Parts Costs, check out the reviews on each that you choose, the buyers purchase price, what they will give you for your own, has the car been service regular, " Will the fresh car be serviced correct" the Road Tax, Insurance costs, Resell loss, As said on here a few times Bob, if the seller tells you at 12 o clock mid day, do not believe, they want to get rid of the car, whatever you choose, take a person that knows a bit with you, my wife has a Peugeot 206 hdi, I service the car, it has never given trouble but I have heard story's, you have to make your own judgement, If you have the Money, you have the ( ACE CARD) remember that, the garage want's your money, you can walk away??? go for want ever you can.