I am selling this lens because I want to go a different direction with my lens setup. It has been a fantastic lens and I am really sad to let this thing go. I am selling for $1100 shipped and will make sure to package it so it does not get damaged etc. The lens is in 9.5/10 condition with no scratches, fungus, etc.
I once had a weird instance where the USM failed to grip and I easily solved the problem by switching it from AF to MF mode and I have never experienced it since. The AF works perfectly and if there's any problem with MF you can switch it from MF to AF and back again to get rid of the bugs. Hope someone is interested in this lens!
Sorry for such quick, terrible pictures.