That set is in pretty good shape! I working on a set very similar to yours right now. As Glenn suggested, just clean them up and they will look new. On synthetic materials, I will use a polymer wax. I use a Renaissance wax on natural materials. Your case can be cleaned up also. In today's market, I think you would be disappointed if you sold them individually. I agree also with using them. With not much work, you will have a very nice set.