Aldo- The one down side to Trulia is they are often delayed in updating their database of homes and status.
You should make the deposit as large as you are comfortable in offering. The larger the deposit - generally - the more serious your offer is taken.
I may have a listing coming on in that neighborhood should you be interested.
Go to my site http://www.PotomacSecretAgent.com for a list of homes in Potomac that is constantly updated.
Associate Broker - Weichert