Model Wholesalers and retailers of goods and services. Sales may be made based on list prices or through auction.
Virtual Merchant --or e-tailer, is a retail merchant that operates solely over the web. Amazon.com
Catalog Merchant -- mail-order business with a web-based catalog. Combines mail, telephone and online ordering. Lands' End
Click and Mortar -- traditional brick-and-mortar retail establishment with web storefront. Barnes & Noble
Bit Vendor -- a merchant that deals strictly in digital products and services and, in its purest form, conducts both sales and distribution over the web. Apple iTunes Music Store
for more info: http://digitalenterprise.org/models/models.html