You will have to contact FN to find out.
No sn data in the public domain that can answer your question.
Have you tried their web site?
The F2000 assault rifle was developed in Belgium by Fabrique Nationale d'Herstal.
No public domain sn data to answer your question.
You MUST call Browning.
100-1000 USD or more depending on specifics
Can't be answered without a DETAILED DESCRIPTION OF ALL MARKINGS and what it is (rifle, handgun, shotgun)
No way to answer without a description of ALL markings.
Blue Book of Gun Values
Depends on your pocketbook.
A answer cannot be given unless you provide more information,such as the serial number,condition of the rifle,and if the .22 cal rifle is a lever action,semi-auto etc.
100-1000 USD or so depending on EXACTLY what you have and its condition.