We purchased, at an Estate Sale, a set of Copper pots and pans. They are stamped "1810 Paul Revere." They appear to be solid copper on the outside, stainless steel on the inside, with brass handles. There are 3 sauce pans w/ lids, a saute pan and a skillet. Are they meant to be decorative? What is their value? Are they good pans (if indeed they are stainless steel on the inside) for cooking. Thank you for any information.