Your point is well taken; however, Walmart is the world’s largest seller of prerecorded music. Personally I don’t buy their stuff there because they carry a bunch of crap I would never listen to intentionally (with the possible exception of the last AC/DC disc).
How much music does Amazon.com sell? Do digital downloads count a “pre-recorded music”?
You gotta be careful, though. I bought an 80s CD for my wife for Mom's Day. I knew she liked most of the songs on the list. I had looked at several of the multi-CD packs they were selling for $9.99. Some showed the song and artist, others just showed the songs. I didn't realize it, but the entire 4-cd set of songs I wound up buying was performed by the Countdown Singers. I had my thumb over that little disclaimer when I was looking at it. Good rule to follow, if the song doesn't list the artist who performed it, look elsewhere on the CD for that tidbit of information.