Most (if not all) Sigma lenses sold in Europe will go up in price between 9% and 28% on January 1, 2017. The list above shows the old and new dealer pricing for some lenses (check the retail EU prices for Sigma lenses at Amazon.de and Amazon.fr).
RRS will also have a 5-10% price increase on tripods and heads effective January 1st, 2017.
Via NikonRumors