ive never been to stores in sydney, only queensland and south australian ones, but i think this may be a dud website
patro since you've raised this on an international forum, why not just contact majestic and ask about the price list / fish availability yourself instead of speculating etc..?
FWIW our prices for some fish, eg stuff from the Caribean, is much dearer than in the states. While we can import fish, we also aren't allowed to import aquacultured fish. This also affects both prices and availability. Finally prices of fish like achilles tangs are very cyclical - at least locally. But its not all gloom and doom - except maybe for anyone silly enough to pay $20 for a turbo snail.