I guess some people see things differently. My Kia soul is absolutely clean, but I just had a blown motor occur, swapped in a new one and my clean Kia, remains clean.
The engine starting is an excellent way to test other components and systems on a vehicle that you would otherwise not be able to prior to purchase.
I don't see one thing wrong with that ad, infact it is quite honest and probably would get my time if I wanted to swap another motor on a eff-Juan. -BIG DAN