Yeah, I paid through the nose for the Cairo Free Jazz Ensemble years ago and wasn't into it. Sold it for a small profit at around $500 and both me and the buyer (in Japan) were happy with that. I don't think the Michael Cosmic LP is as good as the other two volumes in the series (similar personnel/artwork, Intex label) but at least with that, being a big fan of the Musra-Cosmic-Ertunç triumvirate and knowing Phil Musra personally, I feel connected in some way and don't feel like an ass for paying a lot of money.
Then again there are other records that have been fairly expensive that I have played quite often and love - the Marzette Watts on Savoy (maybe around a $250 record) is an example in that gets a lot of spins in my house and felt very much "worth it."
With those BNs, the LT series and the Japanese King records vary in quality - some of them are just wonderful, others are fairly so-so - but none of them are outright terrible at least. I was tempted to throw down a bill on Hutcherson's Inner Glow, for example, but our man David Weiss talked me out of it.