I sell darkroom equipment at a retail store. The prices have dropped significantly over the last six months even. I also think you can do better. You should offer around 400. The lenses are great, and its a nice enlarger. Don't pay anything for the timers. You will probably want a digital timer to print with anyways. I owned a D5 and loved it, but I sold it after finding a zone VI VC enlarger on ebay for 800. There is a lot out there, and most people grossly overprice their own equipment. I am betting that this person is selling the D5 to make money for their new digital set up. They are a little late on that bandwagon (two years late). People need to stop thinking about what they paid for their equipment and realize that darkroom is a buyers market right now. Its great for us! But it also means that we can take our time, there is plenty out there. As a side, I do ebay for the camera store I work at, and am currently selling a Nikon D1. Now this was priced at 5580.00 when it came out a few years ago...now I expect to sell if for 500 tops. If these new digital converts think that their darkroom gear is worthless, lets see them try and sell their "new" SLR's in a couple of years. Good luck and be patient. If you don't get this one you will have an even better change down the road.
Nick