&gt;&gt;Unlike eBay, where each vendor maintains a separate listings page, Amazon tidily groups its Marketplace sellers by item, hiding away the inferior offers, to showcase the best deals up front. (In seller parlance, landing the number-one spot is called &quot;getting the buy box.&quot;)<p>It&#x27;s a key difference. For example we purchase shipping labels on Amazon and Ebay. On Amazon it&#x27;s harder to know what you&#x27;re getting unless you carefully check the marketplace seller you&#x27;re buying from. The intuitive process of just reordering what worked for you previously from your purchase history doesn&#x27;t work on Amazon as it does on Ebay. All too often, a different seller now owns the buy box with an inferior product.