I rode it for IMFLA last year and upgraded bikes and went from a 10sp to an 11sp. Still plenty of life left before needing re-icing (which costs $53)
$100 shipped.
http://www.icefriction.com/product-page/ice-friction-lubricated-chain
$100 shipped.
http://www.icefriction.com/product-page/ice-friction-lubricated-chain