@williamjohnston I'm very sorry to hear about your condition. Your dilemma about what to do with your system is something I've been considering, too. I've had recurring neck cancer: 2 rounds of chemo and radiation, a neck disection and am currently on immunotherapy in a clinical trial at the University of Chicago. I've already told my wife to contact TMR and I've pretty much paired down what I have to what is currently in use. I would encourage you to hold on to what you enjoy as long as you can enjoy it - but cull everything else to save your loved ones the headache of getting rid of it.
This discussion, however, has made me reconsider whether gifting to a deserving and appreciative relative might be possible. I'm close to my dozen nieces and nephews and I think I will prepare a description and inventory, and circulate it to see if anyone is interested. I know that at least one niece and her husband are budding audiophiles. I would rather give it to someone in the family than sell it.
By the way, I am in the South Loop and would be glad to help in any way. Just message me.
Best wishes.