I found this on Craigslist: http://newhaven.craigslist.org/pho/1135565186.html. I don't know the seller, but thought maybe you can check it out. Good luck! Oh, and I own a Sigma 10-20mm. Love it! Cecilia
I really like the 10-20. It would take a tremendous amount of money to get me to sell it...like say....$600. Don't get me wrong here. My copy is not for sale, but if someone made a real offer of $600...