Re: Pity I'm too young to retire...
I think there might be a caveat with "existing at the moment".
Which in typical business fashion likely glosses over some inconvenient facts; i'd suspect that if you looked you'd find a situation along the lines of:-
A) The batteries on all the drones need replacing in the next 2 years, but the drones built in such a way that means that it's nigh on impossible without replacing the entire drone, or;
B) A competitor has a better version in the pipeline that their business doesn't have any response to.
Solution: sell the company to somebody willing to pay more than the management thinks it's worth who doesn't bother doing any due diligence checking before the company value collapses.