99% of people wont sell a sure enough finished dog. You dont hear many people say " Yeah, I got this dog, man, he just hunts too good for me, bays too many hogs" Instead you hear "Im downsizing" Or "I got some young dogs coming up and need the room" Ive got two that are truly finished and theres no amount of money that can touch them. That being said, if I had to quit hunting for some reason, Id give them to my close hunting buds.
Ive made those trips myself and bought dogs that were culls. But I think the guys who sold them REALLY thought they were good dogs. The best way to do it is to raise a few young ones a year, keep the good ones and cull the rest.