And that is why this case is being brought. Amazon are requiring that the price on Amazon is the cheapest price, even if the retailer would like to sell it on

And that is why this case is being brought. Amazon are requiring that the price on Amazon is the cheapest price, even if the retailer would like to sell it on their own store (or eBay, Walmart, etc) for cheaper. If it’s sold on Amazon you won’t see it cheaper elsewhere.