If you are in the middle of trying to sell a property, it is important as a homeowner looking to sell that you stay out of the way of a potential buyer. You want to allow them to freely roam the property and take it in without being over their shoulder and talking their ear off. I know from experience that a once over works the best and allowing them to go where they want in the home and ask questions along the way is ideal. You don't want to keep trying to sell the home to them. Allow them to be in their mind for a while so they can see themselves in the home and picture what it has to offer for them.