Beretta S. 685 Shotgun Q's

Does anybody know anything about this gun? 12ga over/under. Chambered 2.75"

As far as I can tell it was a lower level gun that was discontinued around 1986.

I've got a friend looking to sell one. I'm curious what the value is in excellent condition. Also, is this a viable gun to consider buying. Parts availability, etc. What I'm finding puts value between $400-$700, depending on condition and whether it's from a shop or not.

Lastly.... This gun was registered in CO to his brother who passed away about 10 years ago. He never registered it in CA to his name. What are the potential ramifications if he sells it. Can it be transferred, or will this cause problems for him.

Thanks in advance. It's a pretty neat looking gun. Lot's of detail work for a fairly inexpensive piece. I'm considering picking it up for myself if it can be done and is a worthwhile venture. I love over/unders. Very classic.