I've got a few rare controllers up for auction right now. Here is a link to all of them and their individual links are listed below.

All Controllers
http://search.ebay.com/_W0QQsassZdoubledownon11

Atari 2600 - Triga Command Joystick Controller
http://cgi.ebay.com/ws/eBayISAPI.dll...sPageName=WDVW

Atari 5200 - Wico Command Control Joystick and Keypad
http://cgi.ebay.com/ws/eBayISAPI.dll...sPageName=WDVW

Atari 7800 - Atari JoyPad CX-78
http://cgi.ebay.com/ws/eBayISAPI.dll...sPageName=WDVW

Coleco ColecoVision - Champ Electronics Keypad Adapter
http://cgi.ebay.com/ws/eBayISAPI.dll...sPageName=WDVW

Nintendo NES - Ban Dai Programmable Mega Controller
http://cgi.ebay.com/ws/eBayISAPI.dll...sPageName=WDVW