We're probably going to change our car (for a people carrier betwn 3yrs to 6 yrs). I know you may say depends on the mileage so we'll assume average mileage, what 10 or 11k a year. Obviously you pay a premium the newer it is because there's less risk in it going wrong.

So, when do you, personally, think costs will start to go up so fast that its a bad economy buying an older car? I'm sorry thats not worded better. What is the optimum age for buying a second-hand car? If it makes a difference it'll probably be an Alhambra or Mazda 5.