No way of telling without knowing what make and model the rifle is, what condition it's in, and what country it was manufactured in.
i have a mk 2 303 british with the org. cleaning kit and would like to know the value my email is rmelvin19632005@yahoo.com
50-300 or so
Value can range from less than 100 to more than 1000 USD
125 USD
50-150 or so
50-250
Approx $25 for the mag., and $10 for the cartridges
125 USD
100-1000 USD depending on specifics
100-1000 depending on exactly what you have, accessories, etc..
50-500 USD depending on condition, variation, accessories, etc..