That particular crown/N is the one used by East Germany; it is not the same as the "other" crown/N you are used to seeing on DWM commercial lugers(both receiver and barrels).
There are way too many variables in luger pricing to give you a "value", you got a deal at $450 for sure. On some venues the selling price may have been 2x that; which only demonstrates that any "value" idea - has no value. JMHO.