A like new copy of The Dobsonian Telescope: A Practical Manual for Building Large Aperture Telescopes by David Kriege and Richard Berry. It is the ultimate guide for the do-it-yourself dobsonian. I found it invaluable for the three dobs I made. Now it needs a new home while I take a break from astronomy.
$25 shipped in the USA. I prefer paypal but will also take money orders.