Does anyone know an expert on trench guns ? As a Marine scout/ sniper in Vietnam from time to time we had access to shotguns, looking at a couple of shotguns one day I noticed a Stevens/Savage m77E it was out of place next to a couple of m12s. Years later I bought a 77E for $100.00 not know much about its history, they're now selling for around $3000.00. Most were left behind in Vietnam after the U.S. pulled out, details on the Internet. A couple of years ago I bought another gun l thought was a 77E when I got it home it turned out to be a m69E stamped U.S. on the right side and stamped V.N. 6XX on the left this one is blued most were parkerized and some of the 69Es saw action in Vietnam basically same gun as the 77E, history of the 69E very limited, being more rare then the 77E how would one determined its value ?