You actually can't list on Trulia as for sale by owner. You would have to pay for what is known as a flat-fee listing service to be on Trulia. Zillow is more FSBO friendly, though.
If you're looking for the best value possible, we created our service to help connect home sellers with top performing agents that compete against other agents for your listing. Because agents know they are competing, they bring out their best services and rates, sometimes lowering commission, which can help you get the highest net gain possible.
Best of luck!