The startup capital required by an individual to start an Amazon business varies from person to person, but generally requires a certain amount of money to purchase inventory, register a trademark, build a website, run advertising, etc. The specific startup capital depends on the type and quantity of products you plan to sell, as well as your marketing strategy. Generally speaking, the startup capital may range from a few thousand to tens of thousands of dollars. It is recommended to develop a detailed business plan before starting to determine the startup capital required and ensure that you have enough funds to support the initial operation of the business.