What do you look for when you buy second hand car?

I like buy a second hand car. why? because the value of car will decrease as soon as you drive it out from dealer.Here is perhaps a need to consider in buying a second hand car: - Do not buy a car that age 4years - Try to buy a car that is still warranty - Do not buy a car that had traveled 60,000km - Do not buy a car that never had accident - Do not buy a car that had been heavily demaged If you do not know about car,it is better you pay person to see the condition of the machine.