The best way for your realtor to get the info you need on a particular home is either by the address or even better under the section named "Listing Info" it gives you a MLS/SourceID with those 2 pieces of information your realtor should be able to locate the home and give you the current status.
That is the problem with searching on "big box" real estate sites like Trulia, Zillow, and Homes.com, among others. They are not true real estate sites - they were created solely to generate advertising revenue. They are not part of our National Association of Realtors, and they are not bound by any rules to keep their listings updated like local Realtors are. So it always looks like they have thousands of more active listings than the local agent sites do!
If you want to view only CURRENT Las Vegas real estate listings, including foreclosures and auction properties, go to: http://www.GreatLasVegasHomes.com. These listings are updated every morning so you don't spend hours viewing properties that are already under contract or even sold.
Hope this helps!
Prudential Americana Group Realtors
The Tonnesen Team - with over 30 years of experience helping families call Las Vegas "home!"
David Cooper Helping Buyers Find Great Foreclosure Deals Since 1994
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Some companies, at their clients request, don't put their listing on the MLS, they want the buyer to call the same company that they are listed with to get a better commission price (if only one realtor is involved there can be a discount offered). In that case the agent would not be able to find the listing... because they are searching the MLS and not the internet sites where it IS listed. I don't know about the property you are looking at, but it is a possibility. Your agent should be able to find the property, even an expired or sold one if it was ever listed on the MLS.
Trulia is not always up to date. It's possible the home was already sold and not updated. There are also foreclosure listings here that are not on the market and may not be anytime soon.
Ask your agent to find you similar homes that are currently on the market.