When we had to move my mother into an assisted living we went through everything. My mother was a knitter. Same princple applies to quilter's knitter's or scrapbooker's. We boxed and sent with her as much yarn as her room would hold. My DH took some to the local sr citizens group; to the facility where my mother went; to the HS where he taught for 34 yrs and we still had yarn to get rid of. My sister also took some and gave some to a good friend of hers. Sometimes you don't realize how much your getting into.
I also had a friend that when she passed away her DH was going to take all her stuff to the dump. Some good friends and neighbors (I was out of town) said "NO". They volunteered to have a garage sale. He had them take what they wanted and they sold the rest. She had 5 machines (no quilting machines). They sold books for no more than $3 and sold the yardage by the bag. They made over $7000.