Can you name anything? One of the biggest complaints I've read about Amazon from the seller side is that they can be punished if they offer a better price somewhere other than Amazon.

The only items that seem to skirt this is repackaged items/junk from AliExpress, but they are or are pretending to be different companies.

I doubt that's legal here in Germany. Well known sites are https://www.idealo.de/ and https://geizhals.de/. But https://www.google.com/shopping should work anywhere no?