I really don't know if anyone still uses cassette tapes to listen to music but when my father died I acquired a dozen of them, but not, mysteriously enough, a device to play them on. So I've not been able to test them and see if they work, but the cases look in good order and they have the original papers in them, not at all dog-eared and my guess is that they weren't played that much.
So I've put them on Ebay in the hope that there are some people who still play cassette tapes and would want them. There's a set of eight classical music tapes ( that includes The Best of Bach, Vivaldi, Kreisler, Beethoven and some Mozart, Wagner's Ride of the Valkyries, 1812 Overture, and some others). Also a set of three religiously-oriented cassettes such as Christmas With You, Songs of Praise, and Gregorian Chants. So these cassette tapes can be found under seller mugsim7's stuff on Ebay for a very good price.