There may be some confusion on the terminology.
"LOAN" Amount is the mortgage amount. This is NOT the sale price.
"DEFICENCY" amount is the amount that is passed due (as Cyndi described)
"Listed" refers to a property that has been placed for sale using a Real Estate professional and placed in the Multiple Listing Service (MLS)
If you are browsing a foreclosure site, it will tell you houses going through various stages of foreclosure as well as the loan and deficiency amounts. This has nothing to do with whether the home is LISTED (i.e.; for sale) or the sale price.
I hope that this helps.
Feekl free to call me with any questions about the process.