I just saw your Luger today - it was highlighted on the S&W weekly newsletter!
Great Luger, a G date is unusual, not rare, but not common!
I collect Vet Bring Back stories, if interested in Vol IV (I give full credit to the owner / family) - if interested shoot me an email or PM
I think you got the info from the S&W forum - its an army, with one matching mag, the value they said on the forum was likely close.
Ed