You wouldn't advertise it as a short sale. You would advertise it as needing short sale approval.
You're not going to go to the bank and say "I'm thinking of listing this house for less than you are owed on it. Will you approve that?"
You're going to find that a seller owes more than be property is worth, but has to sell anyway. Then you will market the property at its actual value. Not it's "gee I hope it could get this amount" value. Its actual value.
Then you will get an offer, and get that buyer FULLY preapproved. If you can get buyer preapproved with the bank currently holding the note, even better.
Then you will present the offer, the proof of value, the facts of the market, and the preapproval. Then you will talk to everyone at the bank until someone approves the deal.
Then the bank has the choice, let this property become their inventory, or take a fair amount of money for it now.
--A