I'm thinking about buying a pano setup. I've been looking around for a pano head, and the Nodal Ninja offerings seem to be quite a good value. But I've got a couple questions:

First, I'm considering purchasing a used NN3. Does anyone have any experience with used purchases? What kind of shape are these in?

Also, will the NN3 support a Nikon D700 (no grip) and a Tamron 17-35 f/2.8-4? Eventually I'd like to upgrade to the 14-24, so I'll ask about the D700/14-24 combo as well.

Thanks in advance for any help you might provide.