If a car feature is enough…
If a car feature is enough to be a deal breaker to the point of, I will not buy it, then I wouldn't depend on a stranger, salesman, or anyone to verify it.
The only thing I would take for granted are government mandated safety items (windshield, smog control, etc.).
Anything else that's a deal breaker, I would verify it.
Placing the responsibility on someone else is the epitome of laziness.