Having recently inherited 2,000 CDs, I have started the mammoth task of going through the entire collection, which including my own, amounts to some 4,500 discs.
Obviously there are many duplications plus some that are not to my tastes, so I have been listening to a lot of new stuff, as well as re-cataloging and trying to find ways to house it all!
Today I took 100 CDs to a charity shop, and warned them there could be another few hundred more to come.