What's a Good Way to Buy Music Collections?

The reason I want ripped files is because my Onkyo DP-X1A DAP can upsample stored files to DSD, and they sound incredible. It is a hirez dap and I can stream Quboz or Tidal MQA. The files stored on an SD card that I upsample to DSD sound noticeably better. See:

• plays Direct Stream Digital (DSD) files (.dff and .dsf formats up to 11.2MHz resolution)
  • selectable Real-Time DSD Conversion converts MP3, WAV, and FLAC music files into DSD-quality audio
• https://pdf.crutchfieldonline.com/ImageBank/v20160623112700/Manuals/580/580DPX1.PDF

Try Bandcamp if your artists are available there since the artist gets a larger share of the profits on that website.

@kota1 Upsampling adds nothing to the sound quality of a CD  44.1/16 file - except bloat, that is.  The line...

"selectable Real-Time DSD Conversion converts MP3, WAV, and FLAC music files into DSD-quality audio" 

...is just absolute nonsense.

@jhnnrrs 

Welcome to the forum, have you auditioned the Onkyo DP-X1? 

There are probably a lot of people who transferred their CD collections to one of those storage devices, have not touched the physical discs for years, and would be happy to sell them. It might be just the disc and the booklet, but that would make it cheaper, particularly because they'd be less saleable to dealers. People might even be willing to sell the cabinet along with them. No legal problem selling physical CDs either.