Hi,
sorry for the confusion. This is a known problem with our online store that happens only occasionally--and unfortunately to you. What's happening is that the store initially thinks from your IP address that you're outside the EU (where we don't have to charge VAT) so it quotes you prices in USD without VAT. Then upon checkout it realizes from your shipping address that you *are* in the EU after all, and so it applies the VAT as an afterthought.
We will in time address this somehow (though it's not that easy), until then please accept our apologies and take some comfort in the fact that you got a slightly lower price even with the VAT then you would if the store had correctly located you. (Not a big difference but still...

Take care & thanks much for your praise of Preamp,
-- dj!