Not sure if there are any serious N64DD collectors here, but japan-ssyduk has listed a "very rare" 1996 World Doshin Exposition ticket for Kyojin no Doshin at $999.99 (i.e. the original Nintendo 64DD version of Doshin the Giant).
I don't know what this ticket is (does anyone know), but I'm assuming it was probably for some kind of video game show to showcase the then upcoming game, as it didn't come out until December 1999. It seems very overpriced, however, japan-ssyduk allows for best offers.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270914679422
