The writing of good classified ads truly is an art that needs to be learned and perfected. Depending on the type of business you run, the development of a good classified ad can boost your annual sales by an average of £5,000 to £20,000 or more.You must first of all forget any notion of selling products from your classified advertisements. Instead you need to concentrate on offering free information to attract as many interested parties as possible for the products or services you have to offe.