The link you posted does not appear to be a listed property.
The homes for sale on Trulia are all listed with real estate agents. So the way to show a sales price on your home here is to list it with an agent who belongs to a Multiple Listing Service (MLS). Your agent can then post the MLS description to various real estate websites, including Trulia, and get your home the exposure you need to get it sold.
If you decide not to list your home with a real estate agent, you can do a Google search for For Sale By Owner (FSBO) websites, where you can post a description of your home yourself. Good luck with your home sale.