Search engine optimization (SEO) and social media advertising on Amazon is a considerable risk, but buying the .Com is a certainty. The perfect domain, without compromising yourself and your brand, has to come first for a serious business, in order to set yourself apart from all wannabe competitors, and create long term leverage with your other communications and potential advertising. If you pick this domain you may not need expensive, super risky advertising at all, or at least not as much.
If the value of one new lifelong customer and its references makes up for the domain cost, imagine how a great domain from DomainMarket.com will benefit when it helps you attract multitudes of unexpected new customers (whose value far surpasses the rising domain investment). Google the Microsoft study proving this phenomenon: “Domain Bias in Web Search”
You also need properly branded professional email if you want to appear professional and convert the highest number of customers at the highest profits. Using Gmail, Yahoo, Outlook, AOL, instead of your own properly branded email address is foolish and unprofessional and fails to add