However, there are some ads that are placed in the classifieds by used car dealer. These cars will typically have a 1 – 3 month warranty. This makes the buyers feel safe about that used auto . Before you scan the classified used cars ads, … Inspect the car underneath and all over for collision repair . Look for difference in paint color, lines that are not straight, or rust in various places. Check to make sure there are no fluid leaks. Move the car to another location …