The D200 was a real solid workhorse for many. Would anyone still buy a D200 now?
I have to disagree with your analogy in this case.
For D200 case, by now D7000, D300, D300s, D700, D3, D3s are readily available and much better. Some of the models I mention can be get for a good price if you know where to find. So in this case, it makes sense to get an updated model.
For D700 case, we don't even know the model number for the replacements of D300s, D700, D3, D3s, D3x. We don't know the general availability dates of the replacements. They are only rumored to be replaced this year. We do not know their specs and how good or how much of an improvement they will be. From the time Nikon made any official announcements, there is still some time for shipment, building up of stock before the products are available. At this point of time, none of us have any credible information, so there is no point arguing or speculating.
If the TS wants to wait, can he/she wait one year? Two years? Or more? No one here knows how long he/she needs to wait. So in this case, I would recommend getting D700.