Hi John.......welcome to TFF!
I have a couple of questions for you to help estiblish your Model PP's value.
Does it have a Waffenampt (Nazi Eagle on top of a circle with swastika in it)?
Does it have any other markings such as NSKK, NSDAP, PDM, RJ, RFV, or RBD?
I don't see any in your excellent photos, but oft times these markings don't show up well in photos.