Very cool collection. I worked at a Buick dealer in the 70's. If I had even one Buick, I would probably be a buyer. Never owned one, just the old German Opels. I did lust after a couple of Rivieras with Wildcat motors, and a couple of GS's.
Was curious about the tri-shield logo and found this:
http://www.trishield.com/History/logos.shtml