simpson/G date value

[byf42]

I was recently offered a very odd mis-matched luger.
2 digit simson frame and toggle train. Not reblued
G date barrel and slide. takedown lever appears to be from the G-date side of the fence.
wooden bottom magzine with numbers not legible.

Finish looks original on both.

Frosty bore, but lands and grooves still sharp

Is $500 out of line for this?

Mike