Each of these courses has a doppleganger public course with an established rate. This is like asking what Taylor Swift could charge at the Bunny Ranch. The price will decrease after a few years.
You make a statement that I agree with the premise...
Every one of these courses is easy to access with the exception of ANGC. If you don't believe me just look at all the people from this site alone that have played them at their leisure. Funny thing is, if they were public the majority of this site would play them for free. They would be begging for raters to extort them to keep their status so they could rob the rest of the rubes.
and then go on to make a statement that contradicts the first.
If the courses were so easy to access the supply/demand based price wouldn't slowly drop. Also the second statement which you regularly spout off is not accurate based on my experiences. I understand you aren't happy that some people get to play your club(s ?) and other courses at a lower per round price than you.
I couldn't even get a job at one of the LA clubs, much less gain access to play. So based on my personal experiences elite clubs are not as accessible as you believe based on your personal experiences and the experiences of your acquaintances.
From my speculative and uninformed perspective on something that isn't happening the green fees would look something like this (many would also have a local price):
1) Augusta - $410 (hosts an annual major but is in the affordable south and not a destination with other public courses so same as Pinehurst price)
2) Pine Valley -$275 (close to Philly but no PGA tour presence, this assumes it only drops a little in the rankings but behind Merion)
3) Cypress Point - $400 (similar to Spyglass, would be similar to Pebble if they still played the ProAm there)
4) Shinnecock - $500 (Bethpage is only $150 but it's run by the parks, it has the US Open Pedigree also with NGLA next door it turns into a pretty good public destination)
5) Merion - $350 (US Open Pedigree)
6) Oakmont - $300 (US Open Pedigree)
7) NGLA - $300 (See Shinnecock comment minus US Open Pedigree)
Winged Foot - $550 (close to NYC with US Open Pedigree)
9) Fishers Island - $200 (needs a hotel)
10) Sand Hills - $150 (pretty remote, and if public I speculate it would have to change maintenance practices)