These seem to be all the craze at the moment.. and for good reason. Put aside the Monster brand-hype-nonsense, these headphones are quite decent performers. If R&B/Hip-Hop/Techno/Dance is your thing and you haven't tried these, you don't know what you're missing.
Anyways, these have just dropped about £46 from the Amazon UK site, making them about £210 delivered minus the VAT. Not sure if it's a temporary drop or permanent. However, given the white versions haven't dropped in price, I am inclined to think it's only temporary.
I used a generous exchange rate of AU$1/£.65 (currently ~£.67 from rba.gov.au) to cover credit card charges. Checked other Amazon sites (.com, .de, .it) and this seems to be the cheapest.
These are currently selling for $599 @ JB HiFi, but I suspect you will be able to haggle for a better price.
https://www.jbhifionline.com.au/hi-fi-home-audio/headphones/…
Warning: Don't be fooled, Dr Dre (as far as I know) is not an actual Dr so buy these at your own risk.
A$322.94 using Amazon currency converter.