I was antiquing today and found three vintage brushes--a synthetic, a boar, and a badger--ranging from $25-40. All had Bakelite handles, one of which was a butterscotch very like a nice restored brush that's for sale on the BST right now. I would be interested in doing a restoration as a project, but not if I end up sinking a ton of money into it, and $40 for what amounts to a handle seems like a lot to me. How expensive is it to restore a brush, and are these brushes worth the price?