I wish some people would get this, but they are too arrogant to research and too ignorant to know. Sigh...I explaind it so many times why it is costs 230€. We don't produce in mass (5000+). We use high-end server grade components like 3M riser and Lian Li manufactured case. DAN Cases is located in Germany and not in China so we have higher fix costs. We don't have our own production so we have to buy from other manufacturer, for them we are competitor, so we will not get the best price. If my company don't make a little profit I can't provide new innovative ideas in future.
The window side panel is a accessoires so you don't need it, but you can upgrade your product if you like. Like by other case companies you have to pay extra for it.