This listing is live on Trulia: http://www.trulia.com/property/3061096182-2837-223rd-St-Sauk
What criteria are you and your seller using to search for it? If you can let us know we can investigate the problem. You can post that information here in an answer, or you can send it to our Customer Service team via the link below.
Actually, Trulia's listing syndication system is really annoying because if you put the listing in manually, a listing syndication system can take it over (because it's the same address) and then you lose the power to change it manually on Trulia. And if the syndication system stops sending it, you have to put it in manually all over again.