Inside, the GNX remains unmistakably rooted in its era. A three-spoke leather-wrapped steering wheel sits ahead of GNX-specific Stewart-Warner instrumentation. Some cars age and others simply become more expensive to own. A 1987 Buick GNX with barely 30 miles on its odometer has demonstrated just how dramatically collector demand can shift, selling for $427,000 after changing hands for $200,000 only two years earlier, states an online report by Bring A Trailer. The black performance coupe, number 450 of just 547 GNXs built for the model year, has covered only four additional miles since its previous sale, adds the online report.From $200,000 to $427,000According to September 2026 report by Bring A Trailer, the GNX previously sold on Bring a Trailer in July 2024 with 26 miles on the odometer. It has since been acquired by the dealer now offering the car in Texas, with the mileage increasing to just 30 miles. The latest transaction more than doubled the car's previous sale price, highlighting the premium attached to exceptionally preserved examples of one of the most sought-after American performance cars of the 1980s.The car comes with manufacturer literature, memorabilia, copies of...










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