I have made a lot of purchases from James G Murphy auction house. Mostly stuff I would buy and then resell. But have had times when something was pictured in the lot image and when I went to pick it up, things were missing. Most likely was someone picking their lot up and grabbed off my lot. Impossible to tell. Murphy's has always tried to make things right for me in these cases, but sometimes it is beyond their control.
As for prices, I have seen some used tooling go for almost retail not including the 13% Auction fee and Sales Tax. I see this especially with the On-line auctions. People get into a frenzy at the end and just keep hitting that button. Crazy. I haven't purchased a single thing in almost two years because of the prices. A couple I that had some great prices but were simple too far to drive for pickup for what I wanted.
Some auctioneers are not, in my mind reputable. I limit my auction adventures to ones with good reputations.