Sounds like more good than bad with your machine mechanically speaking. The lack of Ca DMV compliance might force an out of state sale as last DMV bulletins I read said DMV insists on payment of all back registration fees plus penalties and interest unless annual declarations of non-operation have been filed in a timely fashion. Even so I have heard they will not issue a title release for out of state re-registration unless all fees are paid up to date. I know of someone w/ an AC Cobra replica in similar bureaucratic limbo.
Hopefully I mis-read fine print and the buyer does not inherit this liability. California has unfortunately raised all its taxes, user fees and penalties in attempt to lessen fiscal woes.
If it were with clean title and running well ( Seafoam it and ride it a bit first) I would ask $1500 and see what happens.