The house is not for sale.
Did you read the disclaimer in the listing?
Notice of Default. This property has started the foreclosure process because a loan secured by the property is in default. The borrower/homeowner still has the opportunity to stop the foreclosure by catching up on defaulted payments or paying off the entire loan balance usually by refinancing or selling the property.
This means they have only been served a notice they are behind on some payments. The house may NEVER be for sale.