some of the prepaid visa cards here say "only for purchases in the United States etc etc.."

I am in Australia and use a 28 Degrees Mastercard for competitive exchange rate and no conversion fees.

That said, like Zandel, it has been a long time since I have bought any NG.

You could always set a low credit limit on the credit card if you are fearful of being scammed. I have had my credit details stolen once, and it was my bank who alerted me of the unusual transactions and asked if I made them - the bank reimbursed me very quickly.

I'm not saying Nutaku did it, but the only time I bought gold on Nutaku.com with a credit card I got a call a week later asking if I had just tried to buy a $1700 laptop from Amazon (I didn't). Let's just say Nutaku hasn't gotten my new credit card number from me since.

i think that is why my bank doesnt like nutaku's bank (in Ireland) too shady

It's more likely a bug in your web browser that did that and not Nutaku. It's easier to get a virus on a persons PC than a secure website.