Rare Buick GS 400 Convertible joins Hagerty Marketplace auction with fresh upgrades and a Power Tour appearance. A striking 1968 Buick GS 400 Convertible equipped with a four-speed manual transmission ...
The Buick Skylark GS 400 sat at the heart of the late‑sixties muscle car wave, pairing a midsize body with serious big‑block power and understated styling. Collectors now chase these cars not only for ...