Have to add: When I started wiht film scores and discovered what actually is out there end of the 80s/early 90s, I thought I had to have some classics. Back then it was basically the only way to listen to them at least once is to have them.
I don’t part with CDs anymore as I regretted doing it in the past a little. Unless I have a duplicated like 2nd CD of a new editions contains the old edition I already have.