foreclosure auction at courthouse question

[Adam Drummond]

I am planning on going to my first courthouse foreclosure auction next week.  does a bank that is foreclosing on a property always bid on that specific property at these auctions.  I found a list from the attorney acting as the seller for a couple of the properties.  the list had exact bid amounts listed for certain properties, and for other properties they had $0.  Does this mean that they will not bid on that property.  hopefully I worded this question correctly. thanks in advance for you help.

Adam