Top sellers for a product that fully meets the purpose

The product, ie the Scart plug fulfilled for relatively little money, the desired purpose can connect two devices to one socket. Unfortunatley the first delivered seemingly a manufacturing defect and after some time in operation, the image was blurred. After contacting the seller a New sent without further ado simply that now again perfectly fulfilled its purpose. For a product that costs less than the shipping is a Servcie remarkable. And as a seller which can not afford so many times, I'm assuming that the defect was an isolated incident that was indeed completely healed by the seller.