A P7 at CDNN in exc. condition is $600 according to Rick. (Way more retail)
Add in $150 for Nill grips if you want them, and perhaps $250 for a top flight finish.
If you want one for both of you, multiply by 2.
Here's my P7 with factory bluing and Nill grips, before i added the optics. You could get one just like this for about $750:
And about $1000 if you want it hard chromed or Np3'd or whatever.