Hi,
Most lenders may allow a little off the top or a trim around the edges, but unless the property has been on the market for 75 to 100 days your not likely to get a lender to agree to a 25% discount, but 13% off of the $192k note might be a good starting spot.
Of course if this is a day or two before the auction, then you might get by with 25% off. Your just going to need to get a feel for your market and what's within reason, most short sales today are being sold to owner occupied buyers.
Good luck,
GR