He has no desire to keep it going, so I am sure that he will transfer all his web site files. The ones I have are eight years old and were not updated, but I believe that he has them backed up. I will facillitate (language barrier) everything he wants to do. However, the web site files themseves would have no value unless one bought out his supplies as well.
His main pages are in German and English and he can communicate with the google translating program. However, sometimes they are not very good and could create confusion.
He indicated that he would sell his stock on e bay since he has not the time or inclination to use a web site anymore. Once he sold his stock/supplies, that will be the end of his e commerce. Perhaps now it will be a good time to get items you want by contacting him at his e mail address.