Depending on EXACTLY what it is, 25-2500 USD or more.
its a 38.cal hand gun. so YES!!
50 USD
10-1000 USD depending on specifics.
50-300 USD or so
Yes. Your revolver will fire either one.
10-70 usd
Internet, gun shop, gun show, want ads.
50 dollars
Inexpensive, not to durable, minimal value (50-75 USD)
Value of any gun is based on make, model, and condition. There were dozens of different models of the H&R top break revolvers in .38 S&W- could be $50 or $250.
100-300
50-500 USD or so