Running following auctions for C-Mount lenses on ebay. I tested all of these on my GH1 and include details of usability and coverage. All NO RESERVE Auctions starting at $0.99 so if you're looking for the elusive affordable C Mount lens, this may be your chance!
Kern-Paillard Switar 16mm f/1.8
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270591648163
Taylor Hobson Cooke Kinic 25mm f/1.5
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270591651091
B&H Acura 75mm f/2.8 Made in Germany (Rare, Unusual C-Mount, Gorgeous Glass)
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270592122446
Bell & Howell Angenieux 17-68mm f/2.5 Reflex Zoom w/ 'Dog Leg' Viewfinder
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270591656239
15~150mm f/2.5 Zoom Made in Japan Unbranded, Possibly Canon, Covers 4/3 Sensor
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270592139779
I also have a mint Angenieux 25mm f/0.95 in that I may be willing to list or considering trades for. PM me if interested.
Kern-Paillard Switar 16mm f/1.8
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270591648163
Taylor Hobson Cooke Kinic 25mm f/1.5
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270591651091
B&H Acura 75mm f/2.8 Made in Germany (Rare, Unusual C-Mount, Gorgeous Glass)
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270592122446
Bell & Howell Angenieux 17-68mm f/2.5 Reflex Zoom w/ 'Dog Leg' Viewfinder
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270591656239
15~150mm f/2.5 Zoom Made in Japan Unbranded, Possibly Canon, Covers 4/3 Sensor
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270592139779
I also have a mint Angenieux 25mm f/0.95 in that I may be willing to list or considering trades for. PM me if interested.