I think you'll regret that as soon as you've sold them

Suppose you have a normal life with work, sleep, and stuff. If you are very lucky the time left to listen to music is 4 hours/day average. That is, it would take a full year to listen through a collection of round 1500 CDs. However, since you normally spend far more time with actual favorites it will take rather 5 years (Pareto pinciple assumed) until you pull out any buried CD again, if at all. Since you will buy new stuff during that time, +10 years is more realistic. So what's the point of keeping it? Is it just a hunter-gatherer mindset that is behind it? Or is it against possible value enhancement of potential collectors items? I couldn't answer these questions myself, so consequently I'm going to sell round 80% of my collection. It is hard work to sort out those that really mean a lot but I think it is worth it. There is too much abundance everywhere and sometimes it does good to jettison, doesn't it?
Thoughts?

You regretted selling them before, no? I think you don't need the money really badly, do you?

Those were LPs of which some became collectors itmes. This won't happen for CDs, save for some Space rarities which I will keep anyway since they are on my playlist frequently.
Rio's answer was predicible. We too often think what might be somewhere in an unpredictiable future instead of what is in the present. It's not about the money, it is more a symbolic act to focus on what is really important now. If you think I'm out of my mind, you are very right, my friend.

This argument is flawed because "now" is a fleeting moment ALWAYS! What happens in a month, year, or more, after you've gotten rid of all those CDs, you find yourself wanting to listen them again? Is re-buying a bunch of shit you once owned a symbolic act of "now," or a confirmation of lunacy?

What's important to me now is having lots of albums.