Its always a line ball call.
I would have said "I will be visiting friends in the USA and can I have an address to come and see the machine etc".
You know the old rule "IF IT SOUNDS TOO GOOD TO BE TRUE, IT PROBABLY IS A DUD".
Sometimes it pays (no pun intended. lol) it pays to pay a little extra and deal with a local Aussie seller.
You would look and feel real bad if you got scammed out of 6 grand.