Assuming that it is a model 10-22, it would (depending on condition) be worth somewhere in the $200-300 range. These rifles can also commonly be found in heavily modified conditions and depending on the modifications and the customer's willingness to pay for them, the rifle could be worth up to about $800.
Ruger has sn data on theri web site.
Ruger's web site has extensive serial number data.
If Ruger's website is up, they have extensive sn data on it.
Made in 1966.
by serial number
Ruger has a sn search function on their web site.
Ruger has extensive sn data on their website.
Impossible to answer with out a detailed description.
50-250 usd
Ruger will tell you over the phone. If you can access the Ruger webiste, the data you want is also there.
65-190 USD
50-150 or so