Upload & Sell: On
I bought my 300 f2.8IS in 2008 to accompany me to Tanzania for the first time. My lens was well used w/ a ding by the mount and a few scratches on the protective front element. Despite the limited abuse, the lens performed wonderfully from the first time I shot it. Since that time, it's been to Africa twice, Costa Rica more times than I can recall, on road trips to the Canadian Rockies, Yellowstone, the Tetons, and the list goes on. I shoot it throughout the MN winters and from canoes in the boundary waters. The images from it are nothing short of stunning and are only limited by the photographer.
I use mine with a 5DIII, but have used 1D to 1DIII, and a 7D. The lens is the only thing that is a consistent fixture in my bag since 2008.... nothing else remains since the time of that purchase. Mark I or Mark II... I don't think you'll be disappointed with what it can do. If you visit my blog site, you'll find that more than 90% of my wildlife work is with my 300 f2.8IS (... and I own a 100-400L).
have fun and enjoy your new lens!