It must be in the air, downsizing and organizing I mean. I recently revamped my sewing room, too. In the process, I found I sometimes repurchased items and have a partially done set of quilt blocks that I was making for my grandmother. She has since passed and it was really hard on me as we were very close. I am keeping that project and will someday complete it. I'm so sorry for your loss and certainly understand needing a fresh start for your brother's quilt.
When I donate, I send most of the sewing related items to the local hospice organization. I met one of their volunteer coordinators through a local freecycle group. Thank you for your post, I may have to post some sewing machines on there soon and hope neighbors will put them to good use.