The complete works of Jin Yong can be purchased from e-book stores or online reading platforms such as Amazon's Amazon, B&N Book World, and Google Play Books. Other physical bookstores may also have the complete works of Jin Yong for sale. You can check them at local or online bookstores. However, because the complete works of Jin Yong were relatively precious literary works, the price might be more expensive. It needed to be determined according to the actual situation.