Not all People are Car experts ( and some really dumb ) ...
Im going to say Im smart, but Knowledge is Power ( and thats Why I have Joined the Site, way back when ) ....
They just judge at what they see and give it an estimate .....
They dont know at what so called repair(s) cost nor they think its more than 30 years old, they expect top $$
Thats where you go and see the car in person ( or someone in that area to look at it for you, hopefully a car person ) to get a better judgement of the vehicle ..... Sometimes it involves traveling to find that Perfect Candidate and being happy with it, once its done .....