But that only says anything about the units that were sold decades ago. It's very common that quality brands with very good reputation are bought by some investors, and then they start selling the same crap as everyone else, but to the premium price that their brand and reputation allow them to. And it works surprisingly long before the new crap they sell destroys their reputation. (I know nothing about Vitamix, they may still be great.)
Anecdotally, new units are about the same quality for a higher price than 10-15 years ago. Nothing objective, could be wrong; in my late-2000's case, it was from Costco, so maybe it was higher priced elsewhere.
