you may be able to come close to same value selling the parts without frame as a kit or also separately - depending on tolerance to multiple transactions

could also sell these here in for sale or on ebay

the parts conditions look excellent

or perhaps sell these units separately
barrel + slide
complete toggle asy breechblock thru rear toggle
all parts from the frame that are unnumbered
all parts from frame with same number likely two digits somewhere on the part
magazine

good luck
Bill

Glad to be of service. Feel free to Use our classifieds and hang around to learn about Lugers. There are a great bunch of helpful folks that frequent this site and enjoy helping new folks.

Didn't we conclude some time ago that firearms made up thru a certain year did not need, or did not necessarily have to have, a stamped serial number?
I understand your wanting to do the legal thing. Let's be certain that it is necessary. If the number was not ground off, and the frame was simply an unnumbered part, then it would be a shame to pitch it.
dju

If all else fails you can file paperwork thru the BATF when you make a firearm from a blank receiver.
dju