If you believe what you see on ebay the highest bid on the auction was a bit over $10,000. I can understand this: it's a good looking object, indeed an "historic" object by some definitions, maybe worth $10k to put in the lounge room or man cave. And if you wanted to make it rideable, I suppose you could spend $10k to buy it, with a view to spending a year or two and another $10k+ in unavoidable restoration costs. Then you'd have an interesting bike, I suppose representative of something that was last used by a club man on the grass track in country NSW in the late 1940s.
But there's not much RA about it - maybe just the crankcase with the mounts for the gearbox and gear change cut off, and the barrels? It would be interesting to see if the RA crank and unique con rods were still in there. OB heads? No airbox. Other than the Rudge wheels I suppose most of the cycle parts are DT.
Anyway, let the market decide what it's worth. I see it's relisted (again!) so if you have $25k lying around and want to swap it for an old Douglas racer now's the time. Not for me.
Leon