Since you're in Germany you might want to take a look at aggregators like Geizhals or Idealo. Geizhals in particular enables the user to narrow down product searches by a very complete property/attribute filter. Once you found some products that meet your requirements, both services will show you were they are sold. You will notice that Amazon rarely has the best price and the quality/accuracy of their product listings, descriptions, etc. is downright terrible.
Amazon still features fast, reliable fulfilling, but so do some other shops. Bottom line is that you have lots of choices in Germany.