what the trustee is attempting to do is cut a deal with the mortgage holder to accept less than current value and sell the property "short" but above the amount the secured creditors demand, by doing this they capture money which they can use towards debts.
The sale won't always happen because the secured creditor will want a minimum amount and sometimes the trustee can't make that happen
you could also try to convince the secured creditor (chase) that you will be able to pay your mortgage once out of chapter 7, assuming they have not signed anything binding with the trustee yet.
but if you have been on a course towards foreclosure for a while now the bank will likely prefer to have a quick and clean short sale instead of a drawn out foreclosure and foreclosure auction

