In most cases, when working with a starting capital of less than 15,000 euros and annual profits in the high five-digit range are not to be expected, the legal form of a sole proprietorship is the best and simplest choice. If you have a higher share capital, want to become directly active in the FBA business with several products and want to scale up quickly, you can also consider the legal forms UG and GmbH. With these variants, you are no longer liable with your private assets, but you must expect additional bureaucratic costs for the notary or tax consultant.