Signing up for site like Trulia will not help you in this way. Your home history is in two places:
(1) MLS (Multiple Listing Service) â€“ this has any records of past sales.
(2) Alameda County Tax Records â€“ will show transfer dates and amounts.
Local Realtors have access to both â€“ and will provide the information for no charge. Keep in mind that the MLS records are usually accessible only for the past 7 or so years.