According to messages on the Head Fi forums, these are the UK-only versions of the "Victor HP-500FX" which are available elsewhere (from 2005 actually). Guess what? The Victors are available to you and I for around £100 including P&P!!! The specs are EXACTLY the same. "Rip-off Britain" rules KO.
According to another forum on the same site, JVC UK has sheepishly admitted to the scandalous pricing. It's a pity you have to look in every nook 'n' cranny to root out such caddish behaviour. How about WHF doing an investigation into such uber & clone-pricing of hi-fi products which are aimed at the UK???