Where do you buy your CDs these days?

Not sure where you are, but I live in Tampa. There's an outlet here called Sound Exchange that has thousands of new and used CD's. They never used to ship, but now with the pandemic, they were shipping. Not sure if they will continue, but you can check with them. You can Google them and get their contact info.

I still buy CD's and enjoy their sound and convenience.  All of my purchases are through Amazon these days.  It is the best place to find obscure albums.  Vinyl, CD's, streaming, it's all good played through quality equipment.

@jbmays   Don't know about your library, but my library discontinued CD's three years ago.  All you can get now is downloads, and I think they are MP3's. 

Epilog: Today most CDs are mastered way to LOUD. You can find the problem described if you search for LOUDNESSWAR on youtube.
.
Because of the LOUDNESSWAR, I do not buy new CDs ever.
LPs can NOT be LOUDNESSWAR mastered, so new albums sound way better on LP.
.
DISCOCGS is always my go-to-site for CDs or LPs in physical form.
It is superb sorted and I can search for CDs with proper mastering printed before 1990.
.
The proper thing to do than, would be to rip them with EAC (Exact Audio Copy) on a PC which makes sure by comparing the signatures with its database that everything is ripped bitperfect.
.
After that I convert the FLAC to iTunes lossless ADAC with XLD.
.. to feed my non-oversampling DAC (Metrum Amethyst) and tube amp.
.
best regards form Austria (Europe, not the kangaroos)

I buy new classical CD's and SACD's from PrestoClassical in the UK.  However, their shipping prices have just increased a lot, so Amazon Prime may become my source.