Trulia receives the information from listings, in this case from MLS (multiple listing service). If the agent does not have a profile on Trulia, the listing will still go up, just not their contact information. Couple of things to remember, sites like Trulia and Zillow are not 100% accurate. In fact, if you read Zillow.com fine print, says the estimates can be off up to 20% and to contact a local realtor. They are both good sites and offer a good overall view, but if you want to get the real numbers, sold comparisons and etc, contact a local Realtor.
Tierra Antigua Realty