Vinyl that is impossible to find

I'm looking for one that won't cost me an arm and a leg.

TIA

It’s right next to the MFSL sealed copy of Pink Floyd DSOTM. Joking aside I feel your pain. It’s right up there with buying NOS tubes. I love that band and wish you the best in your search. Happy Hunting, Mike B. 

Probably just hope for a reissue. "MTV Unplugged" was recently remastered on vinyl, so there's hope.

Been looking for Muddy Waters' "The Folk Singer" on the short-lived Vivante label to complete my Vivante collection.  I'm not even sure this 180 gram vinyl disc was ever released -- I've never seen it offered for sale.  (Reviews had rated it inferior to the Analog Productions and MFSL LPs.)

The Vivante stuff is very rare. My feeling would be the AP lps are most likely superior.