There is no accurate way to answer your question without knowing more about the specific gun. Most of the value will depend on the overall condition and exactly what model of firearm it is. There are also variances of value by region where the firearm is located. As a ballpark figure, generic Ruger model 77 bolt action rifles in used good (80%+) condition should have a value of around $300-$400.
200-450 or so
100-300 USD
100-300 USD
100-300 each
100-600 usd
100-300 each
Depending on condition, anywhere from $450-$750.
100-450 or so
300-500 USD
100-500 USD depending on specifics
100-300 or so
About $400