It is a short sale. All the short sale houses I have observed take a long time to sell. They also have weird price changes.
I remember being obsessed with a house in university city back when first house shopping. It was our perfect area, listed for a great price. Unfortunately, it was a short sale and according to our agent everytime an offer came in the bank wanted more. I could actually observe the process using Zillow price history. She advised leaving it to the experts rather than wasting our time. In the end this house sold for the market rate after a long, long time on the market.
