The Buick Grand National was a souped-up version of the Regal that cemented itself as a world-beating muscle car that didn’t need 8 cylinders to hold its own. But even better than the Grand National was the Grand National Experimental or GNX, and now an extremely low-mileage example could be yours.

Built for just one model year, 1987, the GNX was Buick’s way of making “the Regal to end all Regals”. To achieve that, it first and foremost featured a new engine tuned by ASC/McLaren with an upgraded Garrett turbocharger, new intercooler, updated engine and transmission mappings, freer-flowing exhaust system. To match that upgraded power, the car also came with a stiffer chassis and upgraded suspension components.

Read More: 1987 Buick GNX With Just 8 Miles Sold For $200,000 – Would You Spend That Much?

This particular GNX has less than 70 miles (113 km) on its odometer despite being 35 years old and will be going under the hammer at Barrett-Jackson’s Scottsdale Auction in January. In addition to all the original paperwork and literature, it also comes with a never-worn GNX jacket, a GNX hat, and assorted clothing and spare parts.

According to the listing, the consignor, a drag racer and fellow Buick collector, “acquired the GNX in mid-August 2009, keeping it in climate-controlled condition as part of his Arizona-based collection ever since”.

See Also: The Buick GNX Could Smoke Supercars In 1987, And This 1700-Mile One Is Ready For You To Light It Up

Like all other GNXs, power is provided by a turbocharged 231ci (3.8L) V6 making 300 hp (304 PS / 223 kW) and 420 lb-ft (569 Nm) of torque, despite Buick claiming it made less. Power is sent to the rear wheels via a four-speed automatic transmission, allowing the car to accelerate from 0-60 mph (0-97 km/h) in less than 5 seconds, which was enough to keep up with some of the most established sports cars of its day, and is still quick even by today’s standards.

How much do you think this GNX will sell for when it crosses the auction block next month? Let us know in the comments.

Photo credits Barrett-Jackson