In the above example, Adam's profits are the difference between what Bob paid for your item and what the drop shipper charged (less eBay fees of course).
During monetary crisis millions of people got let go from careers. https://Generalstructuresinc.com/view-pdf/?pdf=aHR0cHM6Ly9CcmFuZGFmeS5jb20vYnV5LWRyb3BzaGlwcGluZy1zdG9yZXMv