As Lance has noted, this is a Public Auction sale and CASH (cashiers checks) will be required.
Public Auctions have their own nuances and difficulties. For example see this "Foreclosure Auction Guide" as a primer http://www.youtube.com/watch?v=1CanJbhGdJM
and "Wells Fargo auctions off house they don't own" as further "entertainment" http://www.youtube.com/watch?v=yV6NeHoq1wA
Trustee auctions are the MOST RISKY of distressed property purchases.
I'm assuming you do not have cash so it would be best for you move on to the next property; however, before doing so obtain a "True Pre-Approval", which you can read about here:
If you need a loan you need to contact some good lenders to get pre-approved. We can refer some quality lenders if you like.
Lance King/Owner-Managing Broker
Feel free to call me at 415-200-7202.
I'd advise first to talk to a mortgage broker and see if you can be pre-approve for a loan and what is your purchase limit. And after that start shopping for a property.
I'd be happy to meet with you and go through the process how to purchase real estate in SF and would be happy to help you to buy your new home.