I've come across a couple of cases of 1990 Chinese (Norinco) steel core 7.62x39 and wanted people's opinion on what it might be worth. Prices seem to be all over the map and quite arbitrary, so I'm trying to verify before I either sell it or shoot it. It's the copper washed steel, headstamp 31 90. Steel core, likely, and thus in some people's minds it's a bit like AP. That said, what's the guess on value for a full case of 1140 rounds?