Thanks Pete,

Yes, Hungary is in the EU. (Just joined and that brought the new change) The registration fee that is currently $9,000 is only for registration and regardless where you registered the car before. (If you want a HU plate and you have to if you want to use it there) On the top of that you have to pay 10% custom and 25% VAT. Luckily I don't have to pay the custom and the VAT because I worked abroad 8 years (2 years UK, 5,5 US and half year Canada) and I can bring my personal belongings and cars back without those fees except the registration fee. It is only that expensive for big engines (with European measure) for smaller it is around $3,000. If I want to use the car in HU I have to register it there unfortunately.
Thanks for the info though but it seems that I have to live with that fact.

Robert