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The 1987 Buick GNX is valuable because it combined a scarce, factory-linked performance package with a distinctive place in 1980s muscle-car history. Sources report that Buick built 547 examples, and the car paired an understated Regal shape with an ASC/McLaren-enhanced turbocharged V-6. A 1,200-mile GNX sold for $250,596 on December 28, 2025—but that was one car’s result, not a universal price for every GNX.
Which Buick is the “boxy V-6 muscle car”?
The car is the 1987 Buick GNX, short for Grand National Experimental. It is a distinct, limited-production variant related to the Buick Grand National—not a label for every Regal, Turbo Regal, or Grand National. That distinction matters: GNX auction results should not be applied to those other models.
![Hot Wheels '87 Buick Regal GNX, [red] Muscle Mania 4/10](https://m.media-amazon.com/images/I/51qLyZjHGbL._SL160_.jpg)
The GNX’s understated, squared-off Regal body made its performance less obvious than its reputation. Carlisle Events’ 2013 GM Nationals guide captured the contrast: “In an era of lackluster performance and strangulating emissions regulations, a boxy Buick with six cylinders took on the role of a new type of muscle car.” The guide’s description is useful context, not a formal definition of a V-6 muscle car.
Why does the GNX command collector attention?
Scarcity gives it a clear identity
The Official Buick GNX Registry & Owners Association and RM Sotheby’s report production of 547 cars. RM Sotheby’s says the planned run was initially 200 before demand led to an increase. These figures come from the cited registry and auction-house material; they are not presented here as an independently verified factory production record.
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- 1/64 scale diecast car model of 1987 Buick GNX Black Metallic die cast model car by Muscle Machines
- Detailed exterior
- Real rubber tires
- True-to-scale detail
- Die-cast metal body
That limited run separates the GNX from the more numerous related Buick models. Its appeal is not simply that it has six cylinders or a boxy body, but that it is a specific, recognizable high-performance edition with a small reported production total.
The performance package set it apart
Carlisle Events’ 2013 guide and RM Sotheby’s describe the GNX as using an ASC/McLaren-enhanced turbocharged V-6, with stated output of 276 hp and 360 lb-ft of torque. Those are figures reported by the sources, not independent test results. The combination of turbocharged power and an unassuming Buick body helped give the GNX an identity distinct from more familiar muscle-car formulas.
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![Hot Wheels '87 Buick Regal GNX Treasure Hunt! [Purple] Night Speed 1/10, 9/250, 1:64 Scale Diecast Toy Vehicle](https://m.media-amazon.com/images/I/51kTeYKcf9L._SL160_.jpg)
- 1987 Buick Regal GNX in a Brilliant Purple Finish!
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It belongs to a notable performance era
The GNX is part of the wider 1980s performance-car story. HOT ROD’s overview discusses the importance of GM G-body and Ford Fox-body platforms to that era and their enthusiast aftermarket support. Hagerty’s period-context article also places the Grand National and related Turbo Regals among cars that attracted attention beyond the era’s best-known high-priced muscle cars. This background helps explain the GNX’s cultural appeal; it does not establish a specific value for any individual car.
What does a GNX sell for?
Hagerty Valuation Tools records a 1987 GNX sale for $250,596 on December 28, 2025. The listing describes the car as showing 1,200 miles. That is a dated sale of one particular example, not a market average, a guaranteed asking price, or evidence that every GNX is worth a similar amount.
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- burnt orange '87 Buick Regal GNX 7/8
The Official Buick GNX Registry & Owners Association reports historical figures of $29,290 for the original MSRP and $10,995 for the GNX option cost. Those figures help show how substantial the original option was, but they should not be confused with present-day market value.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What makes one GNX worth more than another?
A headline sale is only useful when compared with cars of similar condition and history. The registry identifies condition, originality, documentation, and history as central valuation factors. Mileage, provenance, and the sale date also matter when assessing a particular auction result.
- Condition: A concours-quality car and a driver-quality example are not interchangeable. Hagerty’s valuation page separates estimates by condition grade, so compare the same grade rather than treating a single number as universal.
- Originality: Changes from factory specification can affect how collectors assess an example. Establish what is original and what has been altered before drawing comparisons.
- Documentation and history: Records supporting the car’s identity, ownership, and event history help buyers evaluate provenance.
- Mileage and timing: The 1,200-mile example’s December 2025 result is tied to that car and that sale date; mileage alone does not establish the value of another GNX.
For a practical comparison, start with the same model year and GNX identity, then match condition and originality as closely as possible. Treat guide estimates and auction results as dated reference points, not interchangeable guarantees.
Does a high sale make the GNX a good investment?
Not by itself. The cited $250,596 result establishes what one 1,200-mile GNX sold for on December 28, 2025; it does not establish future returns, typical transaction prices, or the cost of maintaining and preserving another car. A GNX can be a highly valuable collector car without being a predictable investment.
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