Newbie - Luger Identification and value

[freeman]

I posted this a few days ago, but now I have the pics.

I am looking to buy my first luger and wanted a little advice first.
I am trying to identify what kind of luger this is to get an approximate value. Banner police? The person is selling the gun for a friend who is in a nursing home, so no one is an expert here. I am told it was a nazi police pistol. The top is stamped "1942", and "Mauser". There is an eagle on the side, and all numbers seem to match with the last 2 digits of the serial number.
The magazine is aluminum with a round white button on the bottom. No numbers on the mag. A holster and tool are included and holster number and tool number match each other, not the gun.

Can anyone tell me what kind of luger this is and approx value?
Thanks for any help, don't want to get burned on my first buy.