Re: Buying a mooring or slip in California.
Moorings in Newport use to sell for about $1000/ft two or so years ago. Prices have dropped to less than $500/ft now. That's been due to a change in the way you can transfer a mooring. The city put a time limit,10 years or three transfers within ten years, at which time the only way to transfer the mooring would be to return it to the city and they would issue to someone. No more private transfers. I believe there are 7 or so years left till that takes.
There are also monthly maintenance fees and a bi-yearly inspection needed. For a 40' mooring that runs about $200/mo. I believe (up from about $50 when they changed the law for above).
There are live a board permits and they are issued depending on the location and number of live a boards in the mooring field. They do charge a fee and require you to keep logs of tank pump outs. I'm guessing that's standard.
For more (accurate?) info, call the Newport Harbor Patrol. They are really helpful despite being run by the OC Sheriffs.
Look on Craigslist or The Log newspaper for ads.