I would create a profile in Trulia and click on My Listings. There should then be a submit listing tab that you can click. I would also suggest Zillow, make me move or Craigslist to sell your home.
What model are you selling, what builder? I am with NPRE and we have a lot of buyers in the Stapleton area.
It depends on the location and the PRICE! Offer a nice home in Stapleton in a prime location and well below market price and you can expect to get a fast offer. (The opposite applies...) What's your bigger concern - a higher price offer - or a fast offer and close?