Too Much! These days.
Not sure if the linkw ill work, but the Hobby of exotic Puzzles has an Auction up now.
https://market.cubicdissection.com/search/hpfeat/?limit=80&sort=price_desc
Fortunately, Ive been at it for over 45 years, and I can spend years before or if I solve many,
Its been a Joy, Great Friends, and a very Good Investment.