Trulia doesn't accept By Owner listings. If they did, and you posted here and on every other non-mls site, you only a small percentage of buyers may find you. Top dollar comes from top exposure, which is what a great agent can provide. A great agent Adds value to a transaction, a bad one or none at all can cost you in more ways than I can count.
Chances are you are like many people who hear, "it's a seller's market" and conclude, why do I need an agent. The answers are many and detailed, but for the most likely reason you are thinking you can't afford one, money, is the reason you should afford one. A great agent, not a rookie, weak or distracted agent will give you maximum exposure, the best advice for preparation, negotiate both the price, terms and inspection issues to your benefit and ensure your are safe and protected legally and practically throughout the process. What we do sounds easy, but when it's done right, there is far more involved than what most people see.
Best of luck regardless of how you proceed.