John - $51.00 to ship a small part to Oz is exorbitant. It's not on the Moon! That seller should be hog-tied and branded a cheat. I have a mate in Q-Land and we send stuff back and forth all the time. It costs a bit more to ship stuff, but not the kind of crazy fees that that seller wants to charge you.
Go with Mikey's deal. At least you won't have to worry about being ripped off.
Best of luck...
John