I can tell you about Spain. I have a friend that bought a Skyline GTR R33 V-spec from Japan. Shipping was aprox. 1500€, sorry I don`t remember the export taxes right now.
The main problem is that you need an one off homologation for each car, and once you find an engeneer that does that, prepare aprox 4000€ more for homologation, plus costs for later license plating and so on. At the moment my friend is saving up for homologation.
In Germany, as far I know, it's easier and cheaper, but even buying there, you have to adapt to your home country once you bring the car.