seems like a great deal but really want to d5100!!
Keep an eye on Rakuten super point deals. I got a refurbished from Adorama via Rakuten for $480 with 20x points. So practically it was $384. Couple of week ago there was another deal with 16x points.
Rakuten points are not same as cash, but if you plan to spend more at Rakuten, say for another lens, it is not a bad deal. There are $20 off $50 deals often at Rakuten so you can score a good deal on a lens if you keep an eye.