I have a brand new Dura Ace 9000 11 speed chain in the box, never been opened. I bought a brand new Dura Ace 11 speed crank to use on my 10 speed system and for some reason I thought I needed the 11 speed chain. The 10 speed Dura Ace Chain I currently have will work just fine.
The chain is still in the TriSports shipping box, never been opened, and is $50 + shipping on TriSports.com http://www.trisports.com/...000-11spd-chain.html
I would do $45 shipped.