Look at it this way, the value of your stash keeps appriciating.
All the more reason to make quilts from scraps like your Great-great-grandmother did. I think it is sad that most quilts in shows are from fabrics purchaced especially for the quilt. I think it takes more creativity to use what is at hand and make a work of beauty that can be used and loved.
My local quilt guild has a free table where we can donate any quilt related item, anything not taken by guild members is donated to a local charity. I have gotten a lot of fabric for my church's mission quilts and some of my own charity quilts.