Been some time since I first started up this discussion.
Went to Rainy Day Records with a handful of special digital discs---DVD-A, SACD, even a couple of BluRay audio discs. This was on a Saturday, so I got a guy behind the counter looking angry at the world. Said they were worthless.
Have started subdividing my CDs into "I don't want to keep" and a larger set of "what the hell, I can play them in my car". So, I go between the library with "don't wanna keep" and doing the same at Value Village (a thrift store) getting a 20% discount on their stuff, much of it worth the effort. This involves dropping off a handful at a time for both places. Things are slowly slimming down, I'm keeping the BluRays of Beck's "Sea Change" and Tears For Fears "Songs From the Big Chair", awaiting the visual interface necessary to play them. My Sony BluRay player has no problem playing back single layer SACDs, but DVD-A is not an option until I get a screen for the menu.
Meanwhile, I still buy CDs if they're cheap enough. CDs at the library are always $1 a disc. The Timberland Public Library in Lacey gets a lot of stuff cast off by people from the local college---St. Martin's---so there's always interesting books and CDs there for $1 a pop.