"Call for price"

Not necessarily - just that some people have unrealistic expectations of what their stuff is worth.
Good example: someone on CL right now has an early Valiant described as a ‘roller’ sitting in a field and they’re asking 12,000(!) Yeah they listed a price, but if they hadn’t and I called them I’d expect them to be asking 1-2K and I’d be floored if they told me they want 12 for it.
Look at this classic car dealer in Florida. Lots of really nice cars. Beautiful Olds 442's, nice Boss 351's, T/A Challenger...CALL FOR FREAKIN PRICE! Seriously? Why cant I see the price on the same website I see the car?