If you’re serious about eBay and you have at least moderate technical skills, eBay Web Services are like manna from heaven. They’ll help you automate everything from defining searches to accessing buyer data -- even creating hundreds of new listings or feedbacks at once. John Paul Mueller has written about the easiest eBay Web Services book imaginable.
Bill Camarda is a consultant, writer, and web/multimedia content developer. His 15 books include Special Edition Using Word 2003 and Upgrading & Fixing Networks for Dummies, Second Edition.