The official "appraisal value" of a quilt is a nice concept, but who will pay that price? The antique value of things is like a auction, and right now antique dealers tell me the market is dead.
Much better to look at quilts as practical items, sentimental treasures, or creative expressions.
I think we all would like to see our efforts treated like museum pieces, but our grandmothers mostly made quilts to keep their loved ones warm while adding a bit of beauty to their homes.
Fix them if they are damaged, and label them. And hope that someone will treasure them like you do.