Winter starting provided the Glow plugs are in order a Diesel, they hardly fail with damp starting but it all depends how the car has been serviced, the diesel holds its price better, the MOT is as good as the garage that fill it out! what I mean by that, there are a lot out there that will mot to get rid of the Car / Van, regards the Cam belt / chain, make sure if you bye that you get this in writing & that the Tensions has also been changed, again, if you do not know anything about the working of a car take someone with you that does.