I can tell you this:
Ron F. (seller) is a great guy who has some great machines.
Yes, MIB fetched a high price. But, only because someone really wanted it, AND could /would pay that price. As we all know" How much is something worth?" is asked all the time. Now, we know. We've seen other machines go for high sums in the past.
I love the 69, would loved to have THAT one. However, I couldn't/wouldn't pay that, but someone did. Good luck to them. I'd certainly never bash a seller,buyer, make... Even I, yes, I, have rescued, purchased (non-Hoover species), to give to others who loved them. I've sold, traded, given. I even cleaned them up a tad before they left my place. I'd certainly pay a decent price, even, perhaps over $10.00....
But, Ron sold a few great specimens of Hoover. Seems like "Hoovermania" has "swept" Ebay!