Over $680 is a little steep for a phat pink DS, but considering that it's number one in a lot of 200 Club Nintendo Hot Summer Contest Nintendo DS's might sweeten the deal. On eBay, the item has been listed as:

Club nintendo Hot Summer Contest Nintendo DS Peach Pink Limited 200! One of the most rarest consoles of Nintendo DS System. Japan's Club Nintendo rewards program is running an exclusive summer contest for its members. By registering a Nintendo DS or specific games, members will be entered into the contest and can pick their preferred prize... This is NUMBER 001. The First One Made!!!

I'm sure by the time the auction ends on June 18th, it will be much more. I just love the logo on the box, but I don't have seven hundred dollars to blow on a box. Kim Phu

Rare Hot Summer Nintendo DS Peach Pink NO.001 of 200!!! [eBay, thanks Chilly Hollow!]