Firstly, one has to acknowledge that an auction house is what it is: A disposal site for mostly…read moreworn out things. One also must admit that the dynamic at an auction is deliberately designed to tickle one's dream of 'the great deal' and the urgency of the timeline promotes spending more than anyone wants to spend and often more than the junk is worth on the open market. And the general notion that the 'digital' version is corrupt, creating fake bidders or whatever is another story. AND it's important to say that (aside from the expected gruff attitude of the yard 'bulls') everyone who works at the place, doing the heavy lifting literally or bureaucratically, are perfectly cordial and do what peons do, I mean, would you want to work there?
However, I can describe (briefly?) my experiences: Basically, one need be prepared and capable of fixing things, and be ready to pay, in the beginning or the end, more than you want to, and more than it may well cost on the open market. Before you say that you have to either be an expert or hire one to inspect things thoroughly, for whatever reasons, reasonable or otherwise, you cannot even bring a screwdriver to the yard, and of course, you cannot do anything normal with a machine to really have any idea if it has grave or expensive issues.
I bought a low-hour utility truck which had multiple minor issues, but I paid at least $3000 more than I think it was worth. Then I bought several other lots, from truck racks to welders to chainsaws which were all essentially non-functional or completely blown up. All of it would go on to the trash heap if I didn't have dramatic skill at fixing crap that is TOO FAR GONE for the majority of people in the world. That's mostly why it is on offer.
One can say that if you buy a metal frame for which the MSRP is $1300, (robbery of course) for $80 plus the ridiculous "buyer's premium" and taxes (including Sacramento "city" tax !?!) and spend $100 in gas to burn in 3 hours of driving to pick up the damn thing, you could say you saved $1000. Except of course, I was an idiot, and because it's too much trouble for Barnone to actually measure such things, such that you might know that the frame is not actually square but polygon shaped, despite their published dimensions, and I ended up having to cut and re-weld the frame... ...well, my fault for not properly studying the thing.
There are basically three reasons why stuff is on this lot: 1) It is worn out 2) The gov't deems it a gross polluter which can no longer be operated or 3) Somebody died and their family is cleaning out the garage. In the 3rd case, maybe it is not (complete) garbage and the family just doesn't want to deal with it. But you will likely pay too much, whatever that means.
So finally: I waste your time reading this (if you've made it this far) just to conclude that it is a normal situation, entirely 'buyer beware,' you take all the risk, good luck to you. BUT it would be great, esp. in light of the "Buyer's premium" top skim, (which is not insignificant) if the owners, a 'consortium of investors from the upper east side Manhattan' or whatever, would do us all a favor and instruct the institution to BE MORE DISCERNING about what is on display, and for example if you're going to offer a chainsaw that has been completely seized and thrown in a lake for 3 years, either STATE as much or refuse to offer it. We can dream anyway.
Best of luck to you.