Hi I have the instructions for a Pc Engine Duo for sale. They're bagged and in good condition.
Pic; http://www.neo-geo.com/forums/album.php?albumid=307&pictureid=2597
I'm based in the Uk. However I can ship abroad if anyone was interested but the shipping will be a bit more. However I will do it at cost price shipping and as cheaply as possible. I guess the item is quite light and hopefully not too large dimensions wise so the shippinjg even abroad shouldn't really be very much. I also provide protection when I ship.
£10 + shipping.