Banks list them with Realtors and Realtors put them in the MLS.
There is no secret there.
Pre foreclosure,... is not as easy as it seems.
First off the people don't want to be reached or harassed.
60% of the people walk away and do nothing.
Many of the rest of them are trying for a loan mod.
Most just do not understand they can sell their home upside down and walk away.... Of course the tax laws have NOW officially changed as of the writing of this is New years 2013.
Here again go see your local Realtor.
Harold Sharpe - Broker
So Cal Homes
California Department of Real Estate Broker License # 01312992