Not a nightmare, some papers to fill for sender, but shipping is more expensive and you can have have customs to pay.
The game is PCB only (ZN2 motherboard + ROM board), I think european version (I have to check).
Don't know exactly actual price, I bought it long time ago. I think 80€, so about 88 US$, and shipping about 30€ (33US$) insurred for this price.
For US customs I don't know. In France it's a fixed fee (15€) +VAT (so +20%). But some times you don't have. It depend if they check or not your pack.