You're 55, making $400k a year as a HVAC Repair Company, and while you love the business and your kids are in expensive colleges (not taking over the business) you are offered $8MM to sell. Instant retirement. A buy out isn't the same as selling out because people live off of cash and not principal.
At the end of the day it comes down to how much money your principles are worth. People are commenting about dentists and doctors being bought out. Those strike me as the kind of people that can afford retirement without also contributing to the worsening of society.