Banggood is a giant e-commerce store based in Hong Kong, China. They source items produced by Chinese manufacturers and list them on their site at discounted prices.
They can afford to do that because they source directly from the manufacturers. By cutting out the middlemen, they are able to buy at low prices and avoid any of the markups middlemen often add to the price of the product.
You can get Banggood in the Netherlands by shopping on their Netherlands website, linked below. Use your Netherlands shipping address during checkout and look out for the free international shipping offered on most of their products- if you’re willing to wait a tad longer for your items to arrive.