Usually on a short sale, the lender is working with the seller to come to an agreement to settle for less than what is owed tothe lender. Asking $150k doesn't make much sense. I would say that you're best bet is a foreclosed home, bank owned or REO owned home. I am sure the lender would love to hear from you before it goes to auction. Finding the correct person might be somewhat of an obstacle.
Hope this helps! Good Luck!