The bank is slow to sell foreclosure

[Josh Harris]

I am interested in purchasing a specific property which is in foreclosure.  The current owner says he went through chapter 13 bankruptcy years ago and was surprised to hear it was still in his name at the court house.  I found out which bank had it in foreclosure and contacted that bank.  They simply stated to contact the real estate agent once it is listed.  But it is not listed yet, so the bank then said that it is not yet for sale.  Any advice on who to call next, or do I just need to wait for a real estate sign to pop up?