I worked at a Buick dealer (in the parts department) when those cars were new. That one certainly looks like a beauty.
Like Oledoc said, if that was a GS (and just one year older) I'd be all over it.
I had a 66 Grand Sport, (my first "muscle" car) and a 67 would do just fine in "memory reconstruction" for me.
I doubt it would last very long on EBAY, and I would think it could bring you enough to pick up a Crossfire roadster.
You could also check with a local Buick dealer to see if they would be interested in your car, and if they took a little drive up rt.77 to Statesville N.C. to the big Dealer Auction, I bet they could find you a nice Crossfire roadster there to trade.