I have already had this discussion with my children as I have waaaay too much stuff, including a storage shed of fabric (the girls come "shopping" here) and 11 sewing machines!
I am lucky that my youngest daughter and my daughter-in-law both sew and quilt (and I'm starting to teach my 7yr old granddaughter to sew also) so they are going to choose what they want to keep and what will be sold. I've told them of the value involved and not to sell cheap!