Same for me : When I add the NeoSD pro to my cart, 549 € is displayed, but after login, €664.29 is displayed for the item.
I add that I still have the error :
Unfortunately, there are no carriers available for your delivery address.
I'm from France
Edit : I confirm, the price is not the same with or without login
An other bug : The home link goe to http://terraonion.com.mialias.net/
which need an authentification