"Smart shoppers can beat these companies at their own game, ramping up competitive pressure by accessing legitimate, cheaper products through unofficial online supply channels."

Choice noted that other countries' product warranties may not be recognised in Australia and consumers run the risk of having their accounts suspended.

"As long as consumers are aware of the risks and do their due-diligence, there is no reason why they cannot pick up a bargain online with confidence," Levey said. "It also undermines the virtual walls these companies have built around the Australian market, which in the long term will help bring down prices to a global parity."

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