I am in the same situation, being 71 and not having cared for my most valuable material posession very well in my youth (my body). My great hope is that one of my kids or son-in-laws or any realtive will want them, as well as my system. I have listed most of my collection in DISCOGS, as has been mentioned.It’s a lot of fun and you can see what other members are selling the same release for. You can also see the high, low, and median prices that the release sold for in the past as well as when it last sold.
I was surprised how much some pople paid for some of my pieces, so if there is any chance you have some thing rare or valuable, check it out. You can also offer it for sale. I am not planning on selling much of my collection that way. Too time consuming but I am not going to toss out my Linda Ronstadt Live in Hollywood 2 LP set from Rino. It has sold for $99 and someome is currently asking for $199. Of course it also sold for $21 at some point. You will need to enter the bar code, catalog number, or matrix/runout code because it may make a big difference.
If I can’t find someone I know who will enjoy my stuff I would donate my collection to a Habitat For Humanity re-sell store. I know they are a true charity. Goodwill, not so sure they are 100% not for profit.
My system will be sold if necessary. Lots of ways to do that.
@kmcong I have 355 CDs and am fortunate to not have seen any rot....yet