Gary & Kipper,
The 200-400VR is constant f4 and IF. It's the most expensive lens in Nikon range and it's the first come with all the new tech as VR in it range, the demand is great in the US, whlie in Australia, I sold 3 of them to 3 difference Govt. Dept. and as far as I know only 2 or 3 gone to the private users no other info of anyone else.
The 200-400 is not in mass production as other range of lens, therefore stock is not healthy from Nikon, and back-order list was long, US$5500.00 is not too expensive with this glass in comparison with another long zoom but additional accessories added up to its purchased price make the final purchased prices look
to someone.
The 300/2.8 VR will be another gem for sport or wildlife shooter in low and natural light, it's quite fast as it advertised, we have to wait and see, hope that I'm able to show them off in some of the meet next year.