Disk-kun Super Mario Bros. Game & Watch. This special edition Game & Watch, inside a case shaped like the Famicom Disk System mascot, was given away to high scorers in a Famicom Grand Prix F-1 Race contest.
Since the contest has long since ended, and you’d have no shot against whatever dudes have been playing Famicom Grand Prix since 1987, there’s no way to get one of these for yourself. Unless someone were to put one on eBay, like has been done right here.
Unfortunately, there’s something of a high score contest going there, too. The current bid is at $1225.
See also: More eBay stuff