Looking back on my life's decisions, I will have to say that purchasing repos and reselling them was one of my most interesting experiences. I learned a lot. Some folks think a kitchen sells the house, and it does. Some say that the bathroom sells the house, or the staging of the living room. But I can say that a new a/c or heat pump will make the sale easier, quicker and you will feel better when you see the owners months later. Whether they say it and whether they know it, everyone wants their a/c and furnace to work and they often buy a home warranty to insure it. Remember, most new units have their own warranties!