Will buy laptop (not needed) and would hear your experiences on the various online retailers on Black Friday. Actually, I do not buy PC stuff on Amazon but they had good deals on the last Black Friday (unfortunately I did not look at the laptop offers)
I can only recommend Alternate.de on Black Friday.
They usually have the best prices on Black Friday.
Look at Notebooksbilliger.de
Just where it is cheapest.
I would always look at price comparison sites like Miser and Idealo.
Likewise always on Notebooksbilliger, Amazon etc. Look, what there's for discounts. By no means focus on a single page.