It cost me about £50 but I suspect that it is worth more. Apologies for the pictures as they were taken on the bonnet of the car while on the road trip so the pen is 'as found'.
![Posted Image](http://i54.photobucket.com/albums/g114/Luminarium/DSC03316.jpg)
![Posted Image](http://i54.photobucket.com/albums/g114/Luminarium/DSC03315.jpg)
The next step is to remove the petrified ink sac and replace it with a silicone one.