I recently bought one off these of ebay
Metcal SP200
It was quite expensive even 2nd hand but its made soldering a joy. The metal inserts are replacable and it came with a new insert thats very thin. The temperature can't be altered but its amazing at fine work.

Metcal SP200
It was quite expensive even 2nd hand but its made soldering a joy. The metal inserts are replacable and it came with a new insert thats very thin. The temperature can't be altered but its amazing at fine work.