The home is 3123 S LAREDO ST - at least from what I can see on the arial photo. There is no MLS Data, so the home is not listed in San Antonio Board of Realtors MLS.
The only caution I would give you is... Before you spend the money on joining Realtytrac... just know... that a lot of the properties featured on the website for "Amazing Prices" are either not actually for sale, or the value represented in the listing is a suggested 'starting bid' which falls WELL SHORT of the reserve that they will actually sell the home for...
I get this nearly every day, and most folks get mad. ;) Buyer beware.