No way does a cam + reasonably prompt postage total up to anywhere near A$750. When I put in reasonable dimensions and weight for shipping a \6 camshaft from OR to Australia, USPS.com quotes me USD $158.40 for Priority Mail Express International, 3 to 5 days. That's A$223.38. Are you sure you didn't ask Oregon Cam for a quote on, like, seven Slant-6 camshafts?
(At a glance, the cam you describe looks bigger than I would choose for a street-driven car with good manners)
