Ruger's web site has extensive sn data.
If the ruger site comes back up, you can check there sn database
Yes.
Not currently cataloged.
100-1000 USD depending on specifics
Ruger's website has extensive sn data.
Depending on condition, and WHICH version of the M77, between $250 and $500.
Go to the Ruger website. Under Customer Service, Historical Data, Rifles, M77, and the serial number groups for each year are posted there.
1990
Your Ruger model 77 dates to the year 1983 with the serial number that you have provided.
The Ruger website, under customer service, historical data, rifle, M77, will have the serial number ranges for each year of production.
Around 1981
Ruger has extensive sn data for their products on their website.