What you are seeing is a notice of default. Keep your eye out and in the future this home may be on the market at as a foreclosure.
If the price interested you, then it may be useful to know that the lowest priced single family home in San Bruno is currently $348,880 (It is a 2Bed/2Bath).
If it was the street that interested you, there are currently no homes for sale on Crystal Court in San Bruno.
Let me know if you would like any further help in your home purchasing process.
Cashin Company Realtors