Since seeing the original posting I've developed a real fondness for the Webley Junior/Jaguar rifles and have just picked up another Jaguar that was for sale locally in very nice condition for £75.
The Junior I looked at on Gun Trader is still available and some additional photos have been posted today.
It does appear to be in remarkably good condition although the new photos suggest to me that it has been restored (albeit very nicely) but at £160 plus £30 postage it would be an expensive buy.