To answer some of the above points and questions:
* I did go to the FS section, but there were only a few 1D Mk IIs there, and the dates of sale went back over months and into a year, and the prices varied quite a bit. This is why I asked here, because I know some other are more tied into other forums than I am that reflect market prices.
* The seller told me he was a hobbiest, and just took family shots. He said he prefers the size and weight of his Panasonic Lumix DMC-GH1K over the bigger and heavier Canon, thus the sale of the 1D Mk II.He also told me he's never reset the shutter count, and it's got less than 10K. I don't know him, but the pix of the camera and it's condition support this.
* A cursory glance at eBay prices have less than $800 (and more like $700) as a decent price these days.
* The seller is going to be disappointed in the price I offer for his camera. 
Thanks for the input, guys!