Arty notch in receiver; Erfurt??? The radius of the barrel flange looks too gradual to be made from the Luger blueprints...
(Assuming the arty uses the same radius, which the ones I've seen pics of do)...
Front sight base looks like 4" base; blade looks higher than the 4" blade...
Serial stamped into the barrel...
Looks like a fun shooter; but the price seems...excessive...
In the stripped pics, it looks "in the white"...???...