Here is a list of comments regarding camera shops that may help.
http://www.photo.net/neighbor/subcategory-index?id=2
Like Jorge says, make sure you know all the terms of the sale, is the item in stock, is it grey market, does it come with the instruction manual and all the stuff that was in the box when it left the factory, how much is the price, and shipping.
Know all this before you give your credit card #.
Or, click the Adorama link here and deal with a reputable dealer.