Rip Off US? £498.00 (including 20% V.A.T. ?) e.g. http://www.harrowaudiohifi.co.uk/viewitem.asp?MyID=&StockCode=h127re098
Looking at the back panel image from audio advisor shows it as 115V 50/60Hz , so looks like the AC->DC power supply is region specific rather than universal, which increases the number of SKU's that that they have to manage, but allows them to maintain exclusive dealerships and regional pricing differentials.
It could be worse, you could be in Australia for example. http://www.channelregister.co.uk/2011/01/10/internet_tax_row/