There are a lot of gray market camera suppliers on the internet. I don't know if this particular vendor is or is not but I would be wary.
Gray market suppliers are not authorized resellers which means that the camera warranty may not be valid.
They typically take things out of the box and then try to resell them to you. For example quite often a gray market supplier will sell the body without a battery or battery charger. These are things that normally come with the camera but they unbundle them. They then use high pressure sales techniques to get you to buy these accessories and more at higher prices.
I would stay away from them judging by their rating at www.resellerratings.com or at least click the link and read customer reviews and look at their rating.
I know I may pay a bit more but I buy all my equipment from B&H. Has a very high customer rating and I have never had a problem ordering, receiving what I ordered, receiving it on time, and customer service. There are a few other sites that are good [I hear from other users] but I have not done business online except through B&H.