Just go to CDNN! That same gun, in better shape, is only $599 from them.
Comes with that same box and manual, I bet this guy just got a few and is reselling. Theirs still have all the German markings intact and appear to be the original finish, not redone.
They're really nice, too, on the phone.
The one I got is nearly immaculate, a TINY bit of holster wear on the front sight and that's it. They have a funny idea of "B", but I am not complaining!
You can get factory demo mags from CDNN for $39, too.