Rich,
I actually had three of those CW books signed. Maybe you got the one without HHB!
I sell many old books at half price books, which Ron might do if he has one nearby. You get a few bucks each for them, and they actually go pretty fast when they mark them up to half price. That does suggest you would do better $$$ wise on EBay but it is quick and easy.
Regarding those signed books, I actually meant to take an unsigned one to HPB, but accidentally dropped of another signed copy. Went back a few weeks later, saw it, and tried to get it back. When they saw the sigs, including Palmer and Nicklaus, the refused to trade, preferring to up the price and display it in the collector books section. D'oh!
I also once saw a Confidential Guide, and then learned here what it sells for, and went back, but it was gone, too. Double D'oh. I do have copies of each version, so it would have been a quick profit only scheme....