I know what you mean. It is close in price to a older used gen. The cheapest I have seen a decent one for is $1700, and that was even no box no papers, so who knows... When this is done it is on par (visually) with a brand new gen. No fading of the dial, fresh lume dings scratches etc.
On top of that there is the ticking time bomb of the coaxial in the 2500 movement. My first gen stopped at 1 day old. I didn't even have it on for 2 hours. Luckily my AD did right and swapped the watch. With this one I can replace the entire movement for less than half the cost of an Omega service.
Honestly the rep bezel was really good. I probably wouldn't have swapped it if I didn't already have this one lying around. So really I think all you need are the dial, hands, crown and tube. I used the 4th gen He valve but perhaps one from a UPO would work. As for the crytal I would just get the 2geek coating. It is easily as good as the gen, if not a little better.
So I think you could have a REALLY nice piece for $700 or so. You can't touch a used SMP quartz for that.