Well, I've had a few additions since my last post. I now have Japan-EMI pressings of Rubber Soul and Revolver (opened by never played, or played once at most). Damn! It's unbelievable how well even pop/rock music was sometimes recorded over 40 years ago.
I also now have a direct-to-disk recording of Mel Torme accompanied by the Buddy Rich Big Band and a rare (I think it was distributed only in Europe) pressing of Pat Metheny's "Question and Answer" that I got from a UK vendor on eBay.
I recently discovered an antiques pavilion near where I live. A few of the vendors sell LPs, and I picked up the Sheffield D2D of Harry James' band and some Concord Jazz albums of the L.A. Four and the Woody Herman big band (all about $3 ea.). Concord Jazz has some of the most real in-the-room-sounding LPs I've ever heard.
On the same trip, my stepson made what may be the biggest score of all--a Japanese pressing of Pink Floyd's "The Wall," apparently unplayed ($10). Holy shnikes! This has got to be one of the 5 best-sounding LPs in my house, and the best pop/rock studio recording I've ever heard. The dynamic slam on kick drum on this is an order of magnitude better than any other pop studio album I have.