I would have it appraised - simply for you to get some information about your quilt. I have an old one that drapes across the couch in the family room, my grandfather helped piece it when he was a little boy. It isn't worth much money (about $400) but having it appraised confirmed the family history and gave me information I didn't have. If you want to hang it I would hang it folded over something rather than having the weight on just one side. You have a real treasure! I also don't know that I would do anything about the stains - they don't really seem noticeable to me.