Yes, they both show one copy of Part I (it is a two volume book). Based on the bookseller location, it seems both sights are referencing the same copy of the book. Unfortunately, I cannot afford to pay $250-$300 for half of the book (or for the whole book for that matter). Maybe one day a cheaper copy will appear. On the other hand, if anyone can afford it, I recommend to buy it now, because this book does not show up for sell very often.