I have picked up a few over the years and all matching(with mags matching) original condition lugers have been better investments that just about everything but oil stocks !
Can you get the mag out?That might be worth a c note if its not destroyed.
If you really want to get into them this is the place to go:
http://luger.gunboards.com/default.asp That one needs a better story,like taken off a Nazi general in a bunker that was blown up.Maybe scratch AH in the grip and say it was on him when they torched him.