Once you find the home you want, you will make an offer to the seller.  Usually this is a difficult time since both parties have totally different goals.  It is highly recommended to have a third party, such as a real estate professional, negotiate the offer.  If you have any personal interaction with the seller, don't give any information about your move, your current housing status, financial status, or your feelings about their property--positive or negative.  This could hurt you in future negotiations.