What about the other features that contribute to the price of a used car? From smaller ones like if the previous owner was a smoker to larger ones like whether

What about the other features that contribute to the price of a used car? From smaller ones like if the previous owner was a smoker to larger ones like whether the car was involved in an accident (even a smaller one). Usually there is a catch with the lower price. Or should I interpret the hiding feature as "for every 9 out of 10 people selling their cars, there's an idiot that doesn't know what his car is worth".