Buying a property through the foreclosure process is a bit challenging. You may not be able to thoroughly inspect the property, have to take it "as is", and may be bidding against the foreclosure sharks (pros who do this all the time).
What I have found to be a better avenue is to approach owners who have just missed one or more payments and have just been issued their first "notice of default (NOD)". They are not in foreclosure yet, but need to take care of their situation and may be interested in selling. I track the NODs regularly, and then compare the amount of their loans to the value of the house. The key thing is that they have some equity in the property. If they don't, it isn't worth pursuing since the banks will have to be paid first. But if they do have some equity, I would then talk to them about possibly selling. Marin doesn't have as many NODs as Sonoma or other counties, but they do come up, even in places like Ross or Tiburon, believe it or not. Let me know if I can help you in your search.