Prices on guns can be weird things. For example, a pre-64 Winchester Mod 70 sells for about the same price as the Wholesale current production (made in Japan, I think). Worse is the Model 94 which IS Miroku at $919 Wholesale compared to a pre-64 which in really nice shape is about $700.
Then it gets even wilder. You can get an ORIGINAL trapdoor Springfield in beautiful shape for about $600 compared to an Italian copy for about $1500.
Getting back to shotguns. About any German 16/12 Ga double is hard to sell for over $600 at a show. This considering all pr-War guns are top quality. Equivalent non-German guns are over $2000. Some a lot more.