What a poorly written listing and pictures are almost worthless.....looks like the seller is a flipper and put little effort into making a good listing....and no....it does not have cruise control and never did...this guy knows nothing about Buicks.
I have a cruise control assembly for a 70 buick. Not sure they were available in the GS/Skylarks but they were definitely around. Maybe someone added it. Let me tell you, for a survivor, that car does not look too bad, maybe a #3. Mine was a #5 that was a total basket case when I got it and If I were to do it again I would give that car a hard look. Bringing a #5 to a #2-3 is lots of $$ and Lots of work and it will never be a #1 but, its fun as hell to drive, presents well at local shows and its minimal worry.