I'm not taking any sides here, nor am I looking to get into a pissing match. However I wanted to contribute to this thread now that the auction has closed and things have cooled down.
I had somewhat mixed feelings about wanting or needing to know whether or not the Bison actually worked. If I were bidding on something that was NIB - I would want to be the first one to take it out of the box, assemble, plug it in and fire it up for the first time. That's part of the thrill of finding something NIB.
I recall a few years ago, a whole bunch of Compacts were found to be NIB. I think one or 2 of them ended up on eBay. Word spread among VacuumLand members and collectors; many bought at least one, some bought 2 or 3.
Again, they were NIB.
After the vacuums had all been sold, a few of the people who had purchased the cleaners ran into the issue that some of the cleaners didn't work. Stuck carbon brushes in the motor, bad bearings, etc. I think this was only a very small percentage of the cleaners. The sellers started getting nasty emails from those who were having problems -- wanted money refunded, etc... Totally uncalled for behavior. I'm not totally sure what happened, but I know the person said something along the lines that they had completely regretted listing that first one on eBay and then selling them altogether; if they could re-do it, they would have sold the cleaners for scrap.
The machines were sold as-is, no warranty expressed or implied; nor should any warranty have even been assumed by collectors purchasing these cleaners. Yes, they were NIB -- but they had been sitting in the boxes for 35 years. As collectors buying such an item in such a scenario -- that's part of the gamble. You're buying it as a collectible item that is appealing to you; there's a chance that something may not work after sitting in a box for 35 years. If it doesn't work you find a way to fix it! Be that fixing it yourself, or using other members on VacuumLand as a resource to help.
Appliances are made out of moving components that are meant to be run and used. They're not manufactured so they can sit in a box for an undetermined amount of time (say 10+ years). Anything can happen. Cords go bad, wires dry out, grease hardens... Environmental effects can work their wonders.
Luckily, Compact motors are still widely available. I'm not sure that fixing the machines even crossed some of these collector's minds...
Just food for thought.