I am not a quilt appraiser, so I do not know the value of this Carpenter's Wheel quilt. It's beautiful. If it were my quilt I would add a new backing over the old one, then since you said there is minimal quilting, I would quilt it over the new backing, first by SID around the blocks. Hope this helps as it's a beautiful quilt, even if it is just displayed over a quilt rack or a guest bedroom bed, it needs to be seen and enjoyed.