Pete,just for your information Iv'e sold 5 of these in the 22 years Iv'e been at this Buick stuff for $250 apiece. I know the economy is bad and it's not everyone that wants one of these but if it doesn't sell for my asking price I'll just keep it. This is a pretty rare piece, try finding one.
I happen to have the largest supply of original GNX manuals. I am the author of this particular publication. If they are worth $250 each, I have a gold mine!! I also have all the pictures and artwork that went into this supplement. (Not for sale)
I heard the Ebay version are re-pops and not original.