Cheers for the comments all, much appreciated.
I have no idea what the value is, I just went for the most recent sold on ebay which went for 690. Mine is the same as that - I believe it's the MK3 (same as this one
here ) Also I note that a lot of people are selling the various components seperately for a decent combined price - I guess that must be the way forward.
Off to the 'bay to catch the unwary