All I can say is WOW! That car that you use as example is going to be very well bought. There is less than two hours to go and the high bid is at 10.6K. This may be the very best deal on a classic car that I have seen in several years.
I suspect that cars like this black Impala are the exception rather than the rule.
In my case, because I will not buy anthing other than a factory red convertible, I will end up paying more. I am reminded of that old saying “when the top goes down, the price goes up”.