Samantha Lee/Business Insider E-commerce is a growing sector of retail, as well as a burgeoning market for individuals looking to make money by selling products online. Dropshipping is a form of e-commerce selling in which the seller doesn't have to invest in inventory, so the start-up costs are low. Dropshipping can be done from anywhere, as a side-hustle or a full-time career. Business Insider has spoken to and vetted various e-commerce experts to put together a list of resources for people interested in starting dropshipping, or growing their existing business. Visit Business Insider's homepage for more stories. E-commerce is bigger than ever and it's only getting bigger.