Although you said rifle, I think you mean caliber .22 Long rifle, and are referring to a handgun. There are several variants under the Model 101, and most have a collector's value. Worth between $175-$600, depending. This is one that really needs a hands-on appraisal- simply too many variables for a pat answer- Sorry.
High Standard
Fine quality.
50-150 or so
25-100 usd
High Standard, Model A1041
10-200 usd
10-200 USD depending on specifics
50-100 dollars
Check out John Stimpsons's website.
50-300
About 150-200
The High Standard Collector's Association would be a good start. Mr. John Stimson has collected information on various High Standard Firearms, and has a web page. The link below with take you to the rifle listing.