Book excerpt: Over 725,000 people in the U.S. rely on eBay for either their primary or secondary source of income. It is estimated that 14 percent of eBay sellers have retired from their jobs to work full-time on eBay and an additional 12 percent are considering doing so. These online auctioneers need a reliable, easy-to-use resource to maximize profits and avoid common pitfalls and problems.