I got tickets to Japan for $800.. I'm allowed 2 70lb bags because I'm a premier member.. It would almost cost the same to hand carry 5 wheels to Austrailia, and you get a free vacation out of it
With the airlines hurting for business, I don't see why they couldn't do an airport-to-airport freight business, say half the price of USPS, using their excess baggage space.
-Dave