There is a guy selling an ef 500 f4 L IS with metal case in N. Mississippi for $2,500.00. I came across the listing and thought to give a heads up. He describes it as excellent condition with very minimal amount of dust. It is shown with original box and manuals (BH) but the steel container says 600?
Anyhow looks legit and could be a great deal for someone. I came across it on Craigslist though so be deligent!!!! http://memphis.craigslist.org/pho/2053690020.html