A black 1987 Buick GNX wearing serialized plaque No. 461 is for sale at Vicari Auction as Lot S933 in the company's Biloxi Fall 2026 sale, the Collector Car Auction held October 8–10 during Cruisin' the Coast on the Mississippi Gulf Coast. It is a turbocharged 3.8-liter V6 car with a four-speed automatic and a two-tone interior, and the listing gallery shows something that matters more than the paint: a document file that includes the window sticker and ASC/McLaren paperwork.The GNX grille badge on Lot S933. Photo: Vicari AuctionWhy the GNX still sets the standardThe GNX was Buick's farewell to the rear-drive Regal. For 1987, Buick contracted ASC/McLaren to turn finished Grand Nationals into 547 GNXs, and the result was the quickest American production car of its day at a time when V8 muscle was still recovering from the emissions era. That short run is the foundation of the car's collector standing, and it is why a numbered example like this one draws attention wherever it crosses the block.Profile of the black GNX headed to Biloxi. Photo: Vicari AuctionEvery GNX carries a numbered dash plaque, and this car's reads "GNX 461," as the Vicari listing photos show. For collectors, the plaque is the first thing to match against the car's paperwork, because the number is what ties a specific car to its place in the 547-car production run.The serialized plaque reads GNX 461. Photo: Vicari AuctionWhat ASC/McLaren changedInside, the GNX swapped the Grand National's digital instruments for a Stewart-Warner analog cluster with a turbo boost gauge, and the photos of No. 461 show that cluster intact. It is one of the details that separates a true GNX from the many Grand Nationals later dressed up to look like one.Stewart-Warner analog gauges replaced the Grand National's digital dash. Photo: Vicari AuctionVicari's catalog lists mileage as N/A, but the odometer photo in the Lot S933 gallery appears to read about 18,391 miles. Bidders should confirm that figure at the auction site. Mileage is a major driver of GNX values, as we noted when GNX No. 450 surfaced with barely any miles; a driven, documented car sits in a different and often more approachable part of the market.The odometer as photographed for the listing. Photo: Vicari AuctionUnder the hood, ASC/McLaren fitted a Garrett turbocharger with a ceramic-impeller turbine, a larger intercooler and revised engine programming. Buick rated the car at 276 horsepower and 360 lb-ft of torque, figures widely considered conservative. The listing for this GNX confirms the fuel-injected, turbocharged 3.8-liter V6, power steering, power front disc brakes and a tilt steering column.Black paint over the GNX's blacked-out trim. Photo: Vicari AuctionThe chassis work was just as specific: a rear torque arm and Panhard bar, 16-inch mesh-style wheels, fender vents and the removal of Grand National badging. Those cues are visible in the rear and side photos of No. 461, and they are exactly what a knowledgeable bidder will check first. Our 1987 Buick GNX collector spec sheet covers the full list.Tail and rear stance of No. 461. Photo: Vicari AuctionCondition and presentationIn Vicari's photographs, the black paint shows strong gloss and the blacked-out grille and trim look complete. As with any auction car, photos only tell part of the story; Vicari notes that descriptions come from the consignor and that buyers should inspect the lot in person before bidding.The blacked-out grille and quad headlamps. Photo: Vicari AuctionThe interior is listed as two-tone, and the cabin photos show gray cloth seats with black trim. Seat bolsters, door panels and the headliner are common wear points on G-body Buicks, so they are worth a close look during the preview.Two-tone cloth interior. Photo: Vicari AuctionThe console and shifter area also appear tidy in the listing gallery. On a car with a period cloth interior, a clean console and unbroken trim are good signs that the cabin has been looked after rather than restored piece by piece.Console and shifter area. Photo: Vicari AuctionThe paperworkDocumentation is where this GNX stands out. The Lot S933 gallery includes what appears to be the original window sticker, the single most useful document for confirming how a GNX left the factory.The window sticker is in the document file. Photo: Vicari AuctionThe file also includes ASC/McLaren correspondence, according to the Vicari photos. Because ASC/McLaren performed the GNX conversion, paperwork from the company helps connect a car's serial plaque to its build history, which is the kind of provenance that supports value over time.ASC/McLaren paperwork accompanies the car. Photo: Vicari AuctionRounding out the file is a GNX owner's booklet. Taken together, a numbered plaque, analog GNX instruments and matching paperwork make No. 461 at Vicari Auction a well-documented chance to own one of the most important American performance cars of the 1980s, and Cruisin' the Coast gives bidders the chance to see it in person first.GNX owner booklet included with the car. Photo: Vicari AuctionLot S933 crosses the block Oct. 8–10 in Biloxi. Photo: Vicari AuctionAuction HouseVicari expects more than 500 vehicles and collectibles at this sale. The auction is open to the public, and if you decide to bid once you're inside the gates, you can sign up at the on-site office. Can't be there in person? Register to bid online.ASC/McLaren envelope from the car's document file. Photo: Vicari AuctionBidding runs Thursday through Saturday, October 8–10, 2026. This is the 29th year Vicari Auction has held a sale at Cruisin' the Coast and the 30th year for the event itself, which fills the Mississippi Gulf Coast from October 4 to 11 with cruise-ins, live bands, oldies acts and a swap meet. Rooms can be booked through MS Gulf Coast Hotel Reservations at 1-888-388-1006.⚡ Read the full article on Modern Car CollectorSign up for the Collector Car Market Brief. For the latest news, follow us on Facebook and Instagram.
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