I purchased an HD Mil. a few years back in good shape for $350.I have seen them recently in not much better condition than mine for as much as $1200.I don't know if the prices have gone up or the one I was looking at was just overpriced.It wasn't tapped for a suppressor like some of the models used by the O.S.S. or any thing special that I could see.Check with an auction house that specializes in firearms or maybe the Hi Standard web site.There is also a Blue Book of Gun Values.
100-300 USD
Depends on model (and there are DOZENS of models of High Standard pistols) and the condition.
With the serial number that you have provided,your Hi standard Model B was made by Hi Standard in the year 1936.
Mooresville,In about $1200 (used)+ federal tax stamp ( assuming integral silencer)
With the serial number that you have provided,your Hi Standard model B was made in the year 1941.
James Spacek book on Hi-Standard
Frame
How do you find out what a 1055 admiral stereo hi fi is worth model #5m 37 dn
On the frame
With the serial number that you have provided,your Hi-Standard model E pistol was made by that firm in the year 1939.
Any gun that fires is worth something... The Hi Standard revolvers typically range from $150-300 if in good condition.
Hi Standard model 499m