They wouldn't charge you until you ordered. And that article says Amazon will ship it to somewhere near you anticipating your order. And you'll get charged and the package will arrive in hours or so. Not that they'll charge you for stuff you go look at.
Cowboom rates the grades of the consoles along with detailed description of each. Its a best buy retailer. I got a grade 7 blue 3DS XL for my friend and it cost $130. Grade 7 is like new