If they still make it, I would highly recommend a Slik 330 DX Pro for the best sub-$100 tripod. I still have mine (if you're interested) but a D700 with vertical grip and lens is close to its max weight.
I bought a lot of nice gear when I had a great employee pricing plan. Half of it I could never afford at retail pricing. But we got ~50% off Bogen/Manfrotto.
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