If you buy a Trulia Pro membership you can list it on Trulia.
BTW, there are many posts like yours. You should know that on average about 10% of homes are sold by sellers without professional representation. An NAR survey showed that 5% of the sales were to people that the seller knew, and 5% to people they did not know. 87% of the time they eventually listed with an agent.
So I say interview three Realtors, compare their proposals. Then try it. If you are successful, great. If not, and you need to sell, then you can switch to plan B.
Of course if you find a buyer on a site on trulia that does not have agent, then you would not pay any commission at all. Just food for thought.