100-500 USD depending on EXACT configuration, condition, accessoires, papers
You will have to contact Mauser
You will have to call Browning with the serial number.
You will need to start by contacting Mauser
100-400 USD
yes
50-500 depending on specifics
Someone at P38forum.com might be able to assist you.
Current value is an extended stay in a prison if you are caught with it. Get a lawyer and find out how to get the serial number lifted or restamped.
Try Collector Grade publications
100-300 USD
Impossible to value with just the serial number.
No sn data published I know of.