Help with inherited Navy Luger

[steven_robert_lee]

I am wondering if someone may be able to help me. My grandfather brought back a WWI Navy Luger from the war that I have inherited. The luger is a DWM Gesichert navy luger, 9mm, which is represented by a marking M with crown anchor on it. It is complete with the shoulder stock serial number #6050 that matches the gun serial number #6050, therefore the wood stock is original. The barrel is 6". There is no date stamp on the top of the barrel and the shoulder stock and back of the gun has IITD 139 stamped on it, which represents the Second Torpedo Division. I've attached some pictures.

The mechanics of the gun are working. However the overall condition is poor, as can be seen by the pitting and loss of blue. I would be interested in selling the gun depending on the value in it's current state or restoring it prior to selling. However, a few dealers have recommended that I do not restore it as it may lose value and I won't recoup the restoration cost. I appreciate any help.