I have a Dura Ace 7800 10-speed cogset, 12/27 with less than 500 miles on it for sale or trade. Sell: $75 firm
Trade: your Dura Ace 11/21 or 12/21, 12/23 10-speed cogset or Ultegra 11/23 or 12/23. I also need a braze-on or 31.8 clamp-on double front derailleur. Trade details dependent on the condition of your cogset & front derailleur..
I am in Bend, but will include shipping at that price. Pictures on request, but my cassette is perfect.