I also extend my concerns for your health and second the idea to find a major cancer center. In Ohio, The James does amazing work. There are also many experimental therapies you may qualify for that could really extend your life.
But to your question:
My other hobby is astronomy and people accumulate a lot of stuff in that hobby. I have taken to helping widows liquidate their husband's stuff. I agree with your plan of bequeathing items. Since your friends won't talk about it, and it sounds like they don't need anything, how about a local club/group? I know these are harder to find, but they do exist. If you reach out to a few and communicate with their leader you may find someone you would trust to move your equipment on to people who would really enjoy it. I suspect media will be the hardest thing to sell. When I helped liquidate media in the past I went to a record fair and talked to each vendor. In the end I sold the vast majority of the media and got the family about $1,200. Sure, full retail was probably $4,000, but it was gone. I find most widows just want it gone. It brings back memories and sadness.
Take care and don't give up.