We need more info....on the gun...
NWTF - whatever it is, might hurt the value - if the receiver is engraved with it .... What is NWTF and is the gun marked in any way ?
How long is the barrel ?
Does it have changeable screw in chokes ? If yes, what style is the choke - are they Invector or Invector Plus ? What chokes are with it ?
Any scratches or handling marks on the gun ?
How many shells have been run thru it approximately ?
Have you checked the serial number on the browning web site to determine the year the gun was made ...its under support, the banner at top of website...?
( a photo would really help )...