The question can't be answered as asked. It depends on which model, when it was made, and the condition the gun.
300 or so.
50-500 usd
100-400 or so
100-1000 and up depending on specifics
500 or so
100-500 USD
100-300 USD
100-600 or so
425.00 to 450.00
Unaware of any maker by the name of Rugar. Ruger, however, does make a Mark II. Value range 100-200 USD
100-500 USD
1981-1985