Ahh, it all becomes clear now. The problem is that the title is offered on a CD-R. A few years ago eBay was having so many problems with copyright infringements taking place with sellers offering burned CDs that they adopted the scorched-earth policy of allowing NO sales of items burned on CDs unless you were the original creator of the material. Here is the policy:
http://pages.ebay.com/help/policies/unauthorized-copies.html
Here is the text that pertains to this particular situation:
"CD-Rs containing scanned pages from a book, magazine, manual or other copyrighted written materials that were not written by you"
The key here is that although the material is in the public domain, it was not written by you.
I remember when eBay first adopted this policy that even some musicians that burned their own music to CDs were getting their listings pulled. That's how aggressively (and sloppily) eBay was enforcing this policy.
So, sorry, but this is one battle you are unlikely to win.
Ernie.