Aaargh, the D700 is such a great camera that I would pick up a used one on which to mount my old Nikkors, except it seems to hold its value very well!
For example...used D700's sell for close to $1,700 to $2,000 in decent condition, even with between 50,000 to 100,000 clicks on them. The problem is that nice D3's are selling for "only" a few hundred dollars more. One day last week, my local craigslist had a D3 with fewer than 5,000 actuations for $2,300, and another one - with fewer than 500 shots! - for $2,600. The ad for the latter one said "I don't need this camera any more because I'll be getting a D4." Must have been a doctor. Fortunately for me, craigslist went offline the very next day to protest the SOPA and PIPA bills 🙂.