The Sony MDR-ZX700 Headphones are an expensive, well-reviewed pair of headphones.
As a $200 set of headphones, they have received 4/5 stars on Amazon.co.uk and 8/10 from Trusted Reviews.com (http://www.trustedreviews.com/sony-mdr-zx700_Headphones_revi…), but Amazon.co.uk has recently dropped the price to $99.5 shipped.
Next best price in Australia is ~$150 delivered, so that's still a $50 saving
You can get it for $150 and less from several Australian stores, your RRP reference is a joke and misleading, and is just going to result in impulse buys from people who can't be bothered Googling…