Where do you buy your CDs these days?

Hi,
I buy used, mint or near mint condition CD's, from Discogs site.
I will go to Steve Hoffmans site online, to research opinions  on a particular CD I may be interested in buying. There is almost always a consensus, within the many posts, of what particular "pressing" ,of a certain CD, is the best sounding, and which suck: AM+ Japanese mini lp style, MOFI, etc., to name just a few.
You can then enter your choice into Discogs search bar, and find hundreds of sellers of the CD you want. It will list various prices, locations, and condition.
I click on $USD. mint or near mint, and I get a list, at various prices, and geographical locations of the seller, to choose from.
Very reasonable prices, and sellers have feedback listed by their name.
Very happy with the results. I have bought several hundred CD's, over the years.

To add:
You can usually preview the tracks on Discogs. If not, there is always youtube to preview first.

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.