Consumers who want to purchase new, used, older, or upgraded versions of computer equipment will find numerous products for sale over the Internet. The majority of computer vendor sites act as electronic warehouses where visitors can shop for PC-compatible and Macintosh desktops as well as laptops, software, and other computer-related products. These online stores typically provide in-depth descriptions and photographs of available computer equipment and sometimes offer comparison prices, product reviews, and data on item availability. Such Web sites may also feature used-computer classifieds and "bargain basement" closeouts on older models. This section features resources on various online computer stores.