I'm watching the auction but only because I know what the seller wants for the whole lot.
The one that I almost went for in 2019 sold for 1750 but was a bit tatty and the widow didn't have it advertised very well so it took agreed to sell as I think everyone thought it was a scam, in the end it was genuine but 100s of miles from me so I had to pass on it. There was also a French sale of one around the same time but it had bits missing, much the same price. But with all things obsolete collectable the price only goes one way.
Edit: I've seen the peripheral ring go for £700-800 on its own