While the name Regent was used by several companies, the most common (and recent) was an inexpensive European revolver imported by FIE of Florida. These were of dubious quality- values run about $25-$75. They have not been imported in some time, parts are very hard to find.
$25-$200, depending on make, model, and condition. We can't answer without some information- like asking what a car is worth.
Not really worth the time or money. If you have to have it done, let a gunsmith do it.
Could be anywhere from $100 to over $1,000, depending on WHICH revolver, and it's condition.
Made by Charter Arms. Not much more history than that.
$350, depending on condition.
10-40 USD
Your Hi Standard snub nose revolver is valued at between 40-190 dollars depending on overall condition and a good bore.
Depends on who made it, etc., could be 50, could be 5000
50-500 USD or so. no a 357 snub nose used but in go condition. nickel plated
$150-$225
Requires professional appraisal.
It should be.