Sorry to hear about your brother. *sigh*
All I can say is what I think I would do if I were in his shoes ... and I think I would do the same thing. Give the equipment to someone who can enjoy and use it, and spread the enjoyment to as many others as possible.
Can he still do sag support? I know when I've been off the bike because of illness or surgeries, I really enjoyed being a roving sag.
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Proud parent of a happy inner child ...