Here's an auction for a cream dial PRS-54 starting at fairly sensible £325:
https://www.ebay.co.uk/itm/134758947...Bk9SR4SanJHjYg
Will be interesting to see the result.
I see a Berlin Auction House is selling Dreadnought 167
Another PRS-54 flipper (aventurine, new, £545):
https://www.ebay.co.uk/itm/335085544...torefresh=true
Yeh seems like the re sell prices have settled on the Everest.