Hi Mike. I thought a long time before I replied. Typically mine is the "contra" point of view. I hope I don't offend you. This is just my opinion.
I am aged 76 and hope I make it to 83 and past. Albeit I don't have sever breathing problems yet.
According to this site's profile you are aged 83. Much too young to give up your hobby. Unless you are completely debilitated or incapacitated - I say, to heck with it, keep going. Like the legendary "Casey Jones" of Railroad fame, go out with your hand on the throttle wide open. You probably have a supplementary oxygen device. Just turn the valve open more and "keep on keeping on".
I bowl in a seniors bowling league and there is a lady who wears an oxygen tube fixture on her face. To facilitate her approach to bowl, she wheels the tank cart to the edge of the approach and uses a really long tube to connect her as she makes her delivery. She scores OK, but heck, we seniors are just glad to be there!
Don't sell your tools - you won't get much $$ unless you have some truly antique collectors items. Why not give them to a grandson. Baring that, give them to the local senior center or some needy charity in your name.
As the character in the novel "Moby Dick" did, make your own casket. Or, When the time comes, have them bury you with some of your tools.
My point is, unless you can't get out of bed, keep scrolling and "wood playing" and go for it!!
God Bless.
Walt in CT