Me being an Aussie i can tell you we pay no extra taxes unless the purchase is over $1000 AU then we pay an extra 10% (if you declare it

).
I bring components in from all over the world and the only real issues i have had is from lackluster suppliers either not using adequate padding or leaving part of the order out. Ask Jason for advise his packageing is always spot on.
I have had a couple of items ceased temporally by Aust Customs for closer inspection but everything has come through.
USPS is my preferred postal service from the US and I use DHL for all other countries.
Get a paypal account set up they take a bit extra but a secure site is peace of mind for me when paying internationally and I'm sure others think the same.
You can send me whatever you want as a test i will put my neck out there and your guinepig

Good luck