Notice, I didn’t write ‘cheap’.
Forthcoming, a classical part 2 and matching jazz/popular posts. All LPs are available at Discogs, in good shape and for a variety of prices. Too expensive (Furtwängler/Eroica!)? Use Discogs as a starting point for a search. And, don’t forget garage sales & record shows where mono magic money has not yet reached.
The images link to a Discogs or Ebay for sale post. Audiophilia has no affiliation with Discogs, Ebay or the original for sale posters. Proceed at your own risk. If you search around, you may find some real bargains. I lucked out in my mono search.