If Nikon Rumors is true, then D700 will remain D700 and not evolve to become D700s or D700x (with new D3s sensor), instead we will have D800 (with a different sensor?)! So there will be less number of D700 for sale in the BNS section.
http://nikonrumors.com/
Rumor: Nikon D800 instead of D700s/x
By [NR] admin | October 21, 2009
PhotographyBay received a tip that Nikon will not be updating the D700, but instead will release a completely new model Nikon D800 with the following specs:
■Video mode 1080p video recording (full HD)
■High resolution 24.5 MP
■High frame rate: 7 fps without battery grip (similar to D300s)
■51-area Nikon Multi-CAM 3500FX (same technology as D3X)
■Expected to be released before the end of the year
At that point I do not have any reliable info on that rumor. All sources point that D700 will not be updated anytime soon. Maybe this really means a new D800 that could coexists with the D700.