[ThePadawan]

This differs quite a big on the size of the respective business (of sales).

Amazon.de e.g. offers the choice of * credit card (as internationally) * direct withdrawal (meaning you give them your bank account details and they withdraw the amount directly - sort of sketchy from the customer's point of view, but no different from credit cards - if anything goes awry, you just challenge the charge directly with the bank instead of the card issuer) * bill-based (generally only for small amounts or trusted customers - might involve a "credit score" check from Schufa (https://en.wikipedia.org/wiki/Schufa) to deter fraud)