When it comes to buying a used car, there are often black sheep who ensure that the dream car later turns out to be a nightmare car. We give tips on what to look out for when buying a used car. If the need for a car is great but the budget is small, the best solution is usually to look for used cars for sale online. But people in particular often do not know what to look for when buying, so that the dream of an eye-catching roadster does not turn into a nightmare. After all, everyone has heard of the black sheep among used car sellers who are trying to sell an age-old, rusty tin bowl with a bit of paint and odometer manipulation as a top year-old car with a special paint job. Did you even buy a used car online?