Commonly when one looks into buying or selling a property they start out going through a real estate office or agent for the best information about buying or listing a property in the area.
When one is looking for a property they may have sought help through a real estate professional. A real estate professional would have given the buyer the most factual information about the sought after area as well as the listings that were available at the time. If one was looking to buy a property out of the lived in country a buyer may have looked for a real estate agency that had resources available to tour the properties without traveling to the area.
There were various options available through an agency in order to put the buyer into the house that they wanted. An agency was sometimes even able to take a down payment for a property over the computer.