A High Standard with a 2 inch bbl is likely a derringer, and is not meant to be disassembled by the owner. Take it to a gunsmith.
Best left to a gunsmith
Best left to a qualified gunsmith
It will be marked on the barrel.
with a torch
Depends. Generally on the barrel. sales@countrygunsmith.net
Not really
50-150 or so
Best left to a good gunsmith
ABOUT $150, depending on condition.
To remove barrel, first disassemble gun. Remove magazine by inserting a 1/4" dia punch in the hole in the magazine and unscrew. Now the hard part. Unscrew the action from the barrel. You will need a special barrel vice and a special action wrench to do this - if you don't want to bugger up the barrel and action. The barrel vice needs to accomodate the rib (if installed). It needs to use custom made wooden jaws (for each different barrel). Use rosin on wooden jaws to increase friction. These tools are usually only economical to make if you are in the gun repair business.
No. There is a 583,17 made by High Standard though, look at the model # on the barrel again.
25-200 USD or so