In addition, it always takes 2 to tango, regardless of the poster, in any auction.
In this case (and like the Casablanca insert) 2 (or more) heavy rollers were determined to have this Gilda OS and got into a bidding war. Had one (or 2) of those deep pocketed players NOT been there, that day, and bidding, there is always the possibility it could have sold for less.