Hey, the guy could be for real.
I received a similar e-mail three years ago about getting high-res photos of my Magnavox Odyssey, to be printed in a book. I foolishly ignored the request because I'm lazy :-D , but a Google search finds that a book was published in 2005, with the name mentioned in the e-mail ("Collectable Technology") from the company the e-mail came from (Carlton Books Ltd.).
The requested resolution was "300 dpi", but dimensions weren't mentioned. I'm not certain I would have been able to supply what was needed.
It's possible that the person who contacted you is looking for a picture of a pristine machine in an original configuration, at high enough resolution to print in a picture book. That's not what one usually finds on web pages.
