While the press can give very good advertising results, it tends to be very short term and expensive. Price often dictates the content of any advertisement - each word costs money and pictures can be extremely expensive.
The internet gives you the opportunity to paint a comprehensive word picture of your property as well as the ability to show colour pictures that a potential buyer can print off for reference. The number of words and pictures you use does not unduly affect the cost of such advertising.
Because there is no sell-by date on an internet advertisement, it will remain available for potential buyers until the property is sold. Because the advertisement remains available - you do not have to keep paying to have it renewed.
Don't forget, also, that unlike trying to sort out advertisements in a newspaper, it is so easy for a potential buyer to add your property to his favourite pages - at the click of a button.