might be, the difference is +20% (including +VAT on the delivery fee)
interesting, I didn't noticed before that all prices on the SG eshop are "ex. VAT", and I also don't remember that I would payed a higher amount than the price presented on the SG site during my previous orders.
in my country there's a law that all prices must be presented as final prices (i.e. incl. VAT), I always thought that's an EU law