It's worth Federal Prison time.
Your Rossi revolver fires the .38 special cartridge.
No. 38 Special only.
On the frame
40-280 USD or so
50-150
No published sn data. You will have to call Rossi
50-175 USD
No published sn data
go to the rossi site, they have a place to type in your number and will tellyou about it.
75-175 US Dollars
250-400 USD
No sn data outside the factory that I know of.