I think that they would be fun for making any craftsy type items like aprons. Oh, and you can make those Christmas Tree napkins and they make wonderful gifts. If she is just giving it away, I would say take it and you may want to use it. If you offer her money for it, I wouldn't offer a lot for something that you may not want to use too often.
I believe that Craftsy has some classes on serging for non-clothing items.