I looked into this a year ago - but while I was getting together the funds, the auction house informed me that even though I was the only serious buyer that I needed to bid substantially over the starting price because they put a reserve on.
With the added fees on top it pushed it out of the realms of what I thought reasonable for the property (it needed a massive amount of work). Then a similar, but already renovated property came up for almost the same price (once fees were accounted for) so the decision was made.
The auction house was re-auctioned a number of times but eventually put up for conventional sale with about 20% discount from the reserve price. It’s only just sold subject to contract, at even less again.
I think they were trying to get a fast sale, and trying to avoid detailed additional surveys that were needed due to the size of land attached and the state of the property (re-building in a green belt meant I really wanted time to talk to the planning office first).
That said, the auction people were really helpful, I think it would have been straightforward if I had gone ahead; and it was great having a big pile of surveys all ready to go through.
So I think it’s probably ok in the right circumstances but I don’t think it’s an automatic cure all for the housing market!