About $500-$600 new. Used, $250-$450, depending on condition.
100-400 USD
plenty of difference the ppks is a shortened version of the walther pp - it is not a ppk - thanks to stupid govt regulations
The PPK/s is a PP with a PPK slide.
1969-1984
100-1000 without more information.
no published sn data.
100-1000 USD depending on specifics
Someone on the P38forum.com might have access to that kind of data.
You might have better luck on P38forum.com
100-400 USD
It's not designed to do so. (No.)
No such serial number in the PPK/S range.