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
The Hi-Standard Model B with serial number 101213 was manufactured in 1955. Hi-Standard produced the Model B from the late 1940s into the 1950s, and the serial numbers can help pinpoint the production year within that range. For more precise dating, the specific serial number can be cross-referenced with Hi-Standard production records.
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.