You can post on Girlz Gone Riding Los Angeles and Girlz Gone Riding Inland Empire and Girlz Gone Riding San Diego depending on where in SoCal you are at
Craigslist also works great. A lot of people do use the Bicycle Blue book for pricing reference as a buyer. So, if you price high, you might not get a lot of people emailing you. Put out a lot of "tags" at the bottom of your Craigslist ad so that you can get more people looking at your ad
2014 Liv Lust
2013 Specialized Fate Expert with carbon wheelset (sold)
2012 Specialized Amira Elite
2010 Santa Cruz Juliana with R kit and Crampon pedals (sold)
2011 Specialized Ariel Sport,suspension post,Serfas Rx Women's Microfiber saddle (sold)