The retailer is taking €100 reservations for each of the new Lumia smartphones. The Lumia 950's full price at Phonehouse is €504.62. while the Lumia 950 XL is selling for €604.62. It's not clear if those "full" prices include the initial €100 reservation. The phones are listed as shipping on November 25, but again keep in mind pre-order ship dates can, and most likely will, change.
Thanks to Luis for the tip!