Heres an ebay auction for a 7-14mm heres the key info(at the time of writing):
£20, but the reserve hasn't been met.
In as new condition
3 different people have bid for it.
The auction listing is "superb lens" and didnt show up in a search for 7-14mm Pansonic for me
It ends on 28th March 13:34:27 BST (British Summer Time)
Could be a good buy, but depends it all depends on the reserve