For $300 or less on eBay, you could purchase a Shigeru Miyamoto signed pure white Nintendo DS. According to the seller, the console “itself has never been used (and notes that Pure White was available for sale only in Japan.)” Auction page. Click here for first picture in gallery.
On the E3 convention in Los Angeles 2005 I had the crazy luck of winning this Nintendo DS signed by one of the greatest (if not the greatest) videogame personality in the world, Mr. Shigeru Miyamoto himself!