20 Muscle Cars That Skyrocketed in Value Since the ’70s

9. 1970 Buick GSX Stage 1

The 1970 Buick GSX Stage 1 shocked enthusiasts with its potent 455 V8, often outperforming more famous rivals. Its bold stripes and rear spoiler set it apart visually, while its luxury touches made it a unique entry in the muscle car world.
Over time, the GSX Stage 1 became a sleeper hit at auctions, with prices steadily climbing. For details on its market rise and collector significance, check out the Buick collector forums.