Lots of KM or a lot of loss of value?

Good morning, as the purchase of a new car is due, I would like to discuss whether a car with many KMs is not simply more economical because of its small purchase price than the counterpart with few. The following theory: Since I like big cars, which are year 1999 – 2004 have 300hp and are of Audi, BMW or Mercedes, it is not easy, in the spoilt of choice. You see again and again copies with 250,000km around 700€. Between flashes times a few with 70.0 00km, which then cost exactly 14,000€. But maybe you should choose the KM giants, because better honest 250,000km than fake 70,000. Then comes the 7,000€, which one saves at 250tkm, should not eat up, purely theoretically, within the next 5 years. Since the value does not fall much more, there are again fewer costs to be recorded. My current BMW E32 has just 403,000km down, the engine was the last problem he had. Like door lock, seat heating or the petrol pump. What is already certain, the current gas system is taken over into the next one, because certain components are wear-free and save about. 1200€. This means that the next one costs about 2000€ to build it on gas. When changing the operating costs from 20 to about 12€ / 100km, which amotizes the conversion already from 25,000. Greetings Lon