Hi Russ! Carol here at Trulia. To add a sold listing, it does not have to be your own listing. In order to do so, please visit the My Listings' Add Listings section of your account. Once there, you can enter a property address that you sold at some point in the past as either a buyer or seller's representative. When entered, click the orange search button. Upon doing so, you may see a list of all the property addresses available in the area similar to the one you entered so you can make sure to select the correct address for the property you have sold. After selecting the particular address you sold, scroll to the bottom of the list and click next. You will now be on a screen where you can fill out details for the sale. Please make sure to fill this information out fully, and to leave your client's information if you would like them to verify the transaction, or if you would like to ask for a recommendation from them based off the transaction. If you do not want to ask for a recommendation or enter seller's information, just make sure the get recommendation option near the bottom is selected as "no," or you will get errors when trying to continue. Finally, you should just have to click the checkbox indicating that you agree to our terms of service, and you can then add the listing to your sold roster. You can contact your Customer Service Team at http://www.trulia.com/help/ask
or call 1-888-466-3501 if you have any issues or questions.