What extras did you get?
A lot of the 'package' deals have a tripod, bag, maybe some filters, extra lenses, card reader, memory card, etc.
Checking the list of Nikon authorized USA dealers, I see it is not on the list, so you won't get a Nikon warranty with it.
Many of the things in a lot of the package deals are not quality items. Cheap tripods, off brand lenses that may or may not be good, uv filters of low quality that introduce flare to a lot of photos, etc. Not saying this is the case with your package deal but it is in many cases and then if you get serious about your photgraphy, you end up having to buy new quality items.
Hope your deal turns out ok and don't know if you can back out of it or send it back now.
I know one Nikon authorized dealer on ebay and that is Cameta. There are others but I don't recall which they are now. Always look for the 'authorized dealer' logo.

List of Nikon USA authorized dealers http://www.nikonusa.com/fileuploads/...uthDealers.pdf