I also agree provided the 'finished' car is done to a good standard and that can be verified. Guy in my street paid big money for a finished XA and time revealed that the workmanship was not so hot.
I would add to your comment that money/time/effort should go into properly checking a car out before you buy it and that might mean paying someone some money and then, maybe, walking away from a car.
Some people are blessed with time and mucking around with cars is better than anything they can think of. Some peoples skillset allows for them to restore a car at a reasonable price.
BUT..... if we don't have people interested in the cars, restoring them, drawling over the finished ones etc etc etc, then the interest might not be what it is - my opinion anyway.