Depends on which specific variant and condition.
These will range in price from 400-600 dollars for a type III production pistol made by Fabrique Nationale Waffenampt proofed Hi-power.
The value of a World War II Browning FN High Power pistol depends on its condition. They can be found for sale from $1,100 to $1,800.
100-500 or so
Check out the auction sites - Gun Broker, Auction Arms, Guns America.
100-1000 depending on specifics of the item.
Contact Browning.
What specifically is your question???
A Browning Hi Power
50-100 USD or so
About $75, depending on condition..
James Spacek book on Hi-Standard
@ 1980