Peter Jackson's King Kong, still sealed. I'd already bought and opened it, not knowing the 360 add-on came with it, so now I've got an extra copy.
It's the Canadian case, so there's English and French all over it and they removed a little picture and a small blurb about the film from the back (to make room for all the French). The disc could have French on it too, for all I know, but the contents are the same.
The $15 USD includes basic Canada Post ground shipping in a bubble wrap-padded envelope, to Canada or the US.