Mr Compo,
I got mine for £155 when Logitech had a 40% off day (or 2). More recently there have been odd days when Amazon / Currys (I think) had big Black Friday sales.
I think it is a case of keeping a look out for these events/promotions. Here is one good forum for spotting deals as I did!
Good hunting and is worth every penny IMHO.
Ambrose