If you are selling I'd get a letter to assure the provenance. I'd add the usual police premium that collectors add to Ruger handguns. Being 200th year should also add to the value. CDC had a lot of these at each prison. Yours was probably a trade in when they bought new ones. This was a "working" gun owned by the State of CA. Don't confuse it with the fund raiser rifle that was sold to the public (I think they had a CDC prefix on the SN). https://www.californiavictims.com/mini-14-instructions.html
If you want to be a prison guard in CA the academy includes:
State and apply the safety rules, nomenclature, and qualification requirements for the Mini-14 rifle, and be familiar with operation and shooting techniques.
Basic Correctional Armorer Course
($TBD tuition). This is a 5-day, 40-hour introductory course designed to train correctional officers to maintain their firearms & department firearms to factory service levels. Basic Correctional Armorer Course instructs functions and repair of departmental weapons such as the Glock Semi-Automatic Handgun, Remington 870 shotguns, Penn Arms launcher, and Ruger Mini 14
I'll play the smart-alek. CDC,, Center for Disease Control.
Seriously,, I guess working for the DOC would be trying to control a disease of criminals.
As noted above,, it's an early gun,, and with the 180 prefix, it's a little different than the 181 prefix & later versions. I agree that you need to get a letter from Ruger to verify it was shipped to a DOC contract.
I wouldn't pay a premium price for a surplus CDCR mini-14. Keep in mind that every Tom, Dick and Harriet uses the weapons from the prison's arsenal every quarter in order to "qualify". The mini-14s, much like the S&W .38s and the Remington 870s that the department used to use, are well worn, and used & abused. The .38s and 870s were sold off a few years ago for dimes on the dollar. Many COs purchased the commemorative weapons offered from time to time, but few of us bought the surplus guns.