I have a friend - a non-shooter - whose family is in possession of what is reportedly a WWII Luger bring-back. I'm no expert in Lugers, whether commercial or military. I know just enough to know that the value of those pistols to collectors can vary hugely based on the specific gun and provenence, etc. I'm not really planning to become such an expert, and my friend even less so. I'd like to be able to point him towards a dealer or other expert who would be able to examine the Luger, let him know what they've got, and ballpark the value for him. Any suggestions?