I am downsizing and standardizing on Nikon. I bought this lens in early September 2012 from Amazon. It hasn't received much use. On a 5d2 it required -5 on the Micro AF adjust. No problems, glass is clear, no fungus/haze etc. Comes with everything that was in the box. UA date code. I believe you can register it with Canon and receive full warranty, as I include the blank card and I never registered it.
It is just a beautiful lens. Selling it pains me because its rendering is unique. Fortunately I have an EOS system to use when I need it through work.
I am asking $1200, firm, plus insured, signature required shipping.
I have 100% positive feedback on EBay selling many expensive items, including cameras and lenses.
Payment via PayPal. Shipping will be insured/signature required to PayPal verified addresses within the continental US. The following rates are a guide: West Coast: $42. East Coast: $25. Other locations, $30.
Please feel free to PM me.