It is recommended that we give priority to choosing a car source of three to four years in these used cars, and the number of kilometers is about 50,000 kilometers. Because the three to four years of the car in the salvage value rate of the most expensive three years just passed, plus the number of used car kilometers at this time is relatively low, about 50,000, if the ordinary maintenance frequency, these cars are generally in very good condition. Now the general situation is that the general 2 or 3 years will change the car, after which the used car will be driven for 2 or 3 years or 40 to 50,000 kilometers, there is a large chance that there will be no problem, after a few years, small problems gradually appear, that is almost to the life maintenance and replacement. For the warranty rate, the warranty rate of 3 to 50,000 used cars is not much different, there is no most value, the condition of used cars is different, the price is certainly not the same, the better the condition, the higher the price, the worse the condition, the cheaper the price, and then dig the demand: If the pursuit of comfort, it can be specially selected cars, if the pursuit of vision, like large, can accept a slightly higher fuel consumption, then decisively buy a used SUV. In addition, there is one about the identification of water tanks, etc., although the state has regulations, water tanks need to be informed when trading, but because the current second-hand car market is relatively chaotic, how many conscientious businesses will take the initiative to remind themselves that the car they want to sell is a water tank, it is hard to say. Therefore, in order not to let yourself encounter the water car, or choose a more authoritative and guaranteed used car trading agency trade is better.