Once i shopped a power supply from ebay. It had the "Canon" signature on it as well as the CE sign. CE marking stands for "Communaute Europeenne" which means "European Conformity". This is not actually a quality mark. Instead, it adds some directives of safety and functionality for the products that must follow to get this sign. Eventually, products marked with the CE tend to have better quality.
There is another similar CE marking which actually means "China Export". No, I'm not kidding. If you've ever bought some sort of cheap electronic device from ebay, go ahead and locate the CE mark. Then watch this video: