Roger,
It is I suppose what you can get for an honest 4T or L42 or indeed any others in the series with all the CES. The value depreciates without each part of the CES kit but the rifles on their own stand firm at about £4K.
I saw a brush and Charlie G bottle go last week for £250 alone!! Oh how I wish I could turn the clock back, and the loads I had pass through my hands in the believe that "these are cheap little plastic bottles and brushes for the lens!!"