well, there is one proper car still branded Buick. It's made in Russelsheim Germany by the former GM Opel concern, now owned by French PSA group. The Regal, which is an Opel Insignia, and also the current Holden Commodore.
Those Tiacs were rust buckets. The Fords were great with their irs, rear wheel drive, and 4 wheel disc brakes. Built in Lorraine, Ohio. The final T-birds, and Lincoln LS built in Wixom were on the same platform as the swoopy Jaguar S-type.
My Grandpa had a 53’ Nash Ambassador like the red and black one in the ad, only his was two tone green, dark green roof and light green body. I remember I thought it was ugly then. He traded it for a 55’ Studebaker Hawk, three tone, cream, salmon and charcoal grey body, with a cream roof. It was a hot little 2 dr HT in its day.