Because this product category includes a wide range of specific items, it is hard to generalize about the most common or appropriate marketing strategies for accessory equipment. In some cases, as with Hyster forklifts and Xerox office equipment, the producers sell accessory equipment directly. Their presale and postsale service requirements are substantial, but the dollar value of the average sale is high enough to justify direct distribution. When there are many different types of potential customers scattered around the country, the average order size is small, and the product does not require much technical service, (for instance, Black and Decker hand tools). Web-based catalogue sites, such as Commerce One (www.CommerceOne.com), are also becoming increasingly important in this category.