I too see this information everywhere but I have no idea what to trust on this anymore and what information is paid for and gamed by the companies themselves. Brand reputation is its own business these days with its own products and markets.
I'm halfway convinced that selling a brand is just sort of illegitimate - a brand is just a reputation (ie. built-up trust), and selling out your reputation for money on your way out the door is cleanly, obviously immoral.
I'm sure there are arguments for it (like "well surely my son can inherit the family business" and "well surely I can sell the business to someone who I trust to maintain reputation"), but overall those arguments don't change what actually happens: the business is sold to someone who wants the profit from abusing the trust that's been built up.