10 Rare Cars Collectors Hardly Ever See For Sale
Just because a car is rare doesn’t mean it is hardly available for purchase. Many times, in fact, a car’s rarity makes it a hot collectible that often gets flipped. Ford only made 1,358 Boss Mustangs between 1969 and 1970, but they were instantly recognized as keepers, so nearly all of them are still accounted for, and because they keep rising in value, auction sites are littered with them. The same is true of the 1987 Buick GNX, which saw a limited 547-unit run, but judging by the vast number of low-mileage auction listings, it seems like they must have made thousands.
Then, there’s a type of collector car that is every bit as rare and desirable, but far more elusive. Maybe they were sleepers with a value that was only recently realized, so most of them just disappeared, or perhaps their lucky owners love them so much they rarely want to part with them. We’ve identified some of the most remarkable classics that hardly ever show up for auction, many of which have insane value, but still aren’t major players on the collector’s scene. These are the unicorns and Holy Grails that delight enthusiasts, while also frustrating them with their infrequent appearances.
1957 Dual-Ghia Convertible
Recent Auction Sales: 4
The Dual-Motors Corporation, a Detroit-based specialty vehicle manufacturer, partnered with Italian design and coachbuilder company Carrozzeria Ghia to create one of the coolest and largely forgotten American luxury rides. Between 1957 and 1958, they produced just 117 Dual-Ghias, and interestingly enough, all but two were convertibles.
Nearly all vehicles are still accounted for, and many of them have provenance, being the former rides of stars like Frank Sinatra and Dean Martin, plus President Richard Nixon even had one. For whatever reason, the 1957 Dual-Ghia convertible is the slipperiest of the bunch, with only four auction sales over the past 20 years or so. As you can imagine, these cars don’t come cheap, with a top sale of $484,000 at Mecum Kissimmee 2023, and Concours condition value of $543,000.
This ’67 Chevy Muscle Car Is Now Worth More Than A Bugatti Chiron
Classic American performance cars are in the same conversation as European hypercars thanks to this 1967 muscle car.
1967 Chevrolet Corvette L88 Convertible
Recent Auction Sales: 3
1967 was the last year for the C2 Chevrolet Corvette, and in many enthusiasts’ opinion, it was the best year of the best generation for the iconic American sports car. This was when the ultra-rare track-ready L88 package, which included a 430-horsepower 427ci V-8 and heavy-duty performance upgrades, was unleashed. Only 20 ’67 Corvette L88s were built, and depending on who you ask, between four and ten of them were convertibles. It probably doesn’t make that big of a difference, because this car is a Holy Grail either way. Just like that magical chalice, the ’67 ‘Vette L88 convertible requires an epic quest to track down.
Just three of these almost-mythical cars have sold at auction this millennium, and one of them had a replacement 427, so it arguably doesn’t even count. One came out of hiding in 2013 and sold at auction for $3.5 million, making it the top sale for this remarkable rarity. That’s actually a stellar sale, as Hagerty fixes the value between $1.2-$2.4 million.
1970 Dodge Hemi Coronet R/T
Recent Auction Sales: 3
In 1970, the Dodge Coronet ditched its boxy style for some sexy Coke bottle curves, a wicked “bumblebee” grille, and killer twin hood scoops, becoming one of the baddest-looking rides of the Golden Age. None of that really matters because the ’70 Coronet Hemi R/T is one of the most overlooked classic Mopar muscle cars of all time. Despite only 14 of these masterpieces leaving the factory, they have a modest $146,000 top condition value, when similarly rare Mopars are in the millions.
At auction, things are a little better, with a top sale of $335,500 in 2014 and another Hagerty value buster in 2023 for $247,500. The only other one that has sold in Gen Z’s lifetime is the remarkable Plum Crazy Hemi R/T pictured above, which sold for the surprisingly low price of $143,000 in 2019. This car is rarer than a Hemi ‘Cuda convertible or a Charger Daytona Hemi, both of which are million-dollar cars, but for reasons that defy explanation, it remains something of a bargain-bin Mopar.
1966 Ford Fairlane 500 R-Code
Recent Auction Sales: 3
For a brief period in the mid-1960s, the luxury-liner Ford Fairlane became a legitimate intermediate muscle car that almost nobody knows about. Even more obscure is the 1966 Ford Fairlane 500 R-Code factory drag car, of which only 57 were produced. Featuring a fierce dual-quad 425-horsepower 427ci Side-oiler V-8, this car was designed for the track, but would have been Ford’s answer to the mighty 426 Hemi Mopars, if they had made it a regular production model. They didn’t, and every Ford from the Mustang to the Torino spent the entire classic era losing to Dodge and Plymouth muscle cars, but the R-Code did yield one extraordinarily rare collectible.
Only three have ever been sold in recorded auction history, with one at Mecum Dallas 2019, and two on Bring a Trailer, with a top sale of $296,000. That’s actually a little under the perfect condition value of $317,000, but it definitely hits the excellent condition $286,000 price.
10 Ultra-Rare ’60s Muscle Cars That Hardly Ever Hit The Auction Block
Rarities like the Hemi ‘Cuda or Boss 429 are auction regulars, but there are some elusive classic muscle cars that almost never cross the block.
1949 Oldsmobile Rocket 88
Recent Auction Sales: 3
With 99,276 units produced, the Oldsmobile Rocket 88 isn’t exactly rare, but most of those were four-doors and wagons, with a slightly less abundant 45,702 two-door coupes and convertibles. That was back in the day, however, and currently, finding one for sale is like trying to pin down an honest politician or locate a Pikachu Illustrator Pokémon card. Just three have been sold at auction since the Aughts, and one of them might not have been a genuine Rocket 88. This is one of those cars that is desirable and elusive, but not particularly valuable, as the show-condition car pictured above sold for just $30,800 in 2017, with another that reached $35,500 in 2022.
The ’49 Rocket 88 is considered the proto-muscle car as it was relatively lightweight and had a powerful-for-the-time 135-horsepower 303ci Rocket V-8. Its 18-second quarter-mile seems like a riding lawnmower ET to us today, but back then it was blistering, so much so that it inspired the very first rock and roll record “Rocket 88” by Jackie Brenston and His Delta Cats in 1951.
1965 Shelby Cobra 427 Competition
Recent Auction Sales: 3
Carroll Shelby built a little fewer than 1,000 Shelby Cobras from 1962 to 1967, but that rarity doesn’t keep them off the auction block, as all the major houses are positively teeming with listings. The 1965 Shelby Cobra 427 Competition, however, is a rare variant, with only 23 ever built. Shelby had intended this car for FIA GT competition, but failed to hit the 100-car homologation requirement, so it became the scariest street ride of all time.
With a Ford 427ci FE Side-Oiler V8 that could achieve up to 600 horsepower, a 2,400-pound curb weight, and nothing resembling a modern safety feature, this was a car for professional drivers only. Nowadays, it’s a car for tech billionaires, with a $3.5 million Concours condition value. That’s actually on the low end, because of the three that have sold in recent memory, the top sale reached $4.1 million, and another was bid up to $4.8 million but didn’t hit the reserve.
1966 Chevrolet Biscayne L72
Recent Auction Sales: 2
The 1966 Chevrolet Biscayne L72 is the most formidable classic-era car you’ve never heard of. While not exactly a muscle car, because it was full-size and not intermediate, it certainly had street machine performance with a 425-horsepower 427ci V-8 hidden under its plain exterior. Chevy made 1,856 full-size L72 cars in 1966, including Bel Airs and Impalas, so the exact number of Biscaynes is not known, but it was probably around 200.
The number of these OG sleeper cars that have sold at auction, however, is clear, and that is only two. A frame-off rotisserie restoration, 50,000-mile two-door sold for $159,500 in 2014, which is an impressive result for an entry-level sedan. Hagerty values a perfect-condition ’66 Biscayne L72 at just $110,000, which has obviously been beaten, but the second one sold for only $60,500 in 2025, dragging the average well down.
1971 Plymouth Hemi ‘Cuda Convertible
Recent Auction Sales: 2
The Golden Age’s most celebrated auction result belongs to the 1971 Plymouth Hemi ‘Cuda, which reached an astounding $3.85 million in a record-setting 2014 gavel drop. Ten to fifteen years ago, there were some extraordinary auction results, and there has since been a market correction, but the ’71 Hemi ‘Cuda was no anomaly, as another one recently sold at Mecum Kissimmee 2026 for $3.3 million. The craziest thing about this marvelous Mopar is that the top sale could have been so much more.
In 2021, another ’71 drop-top was listed, and the bidding reached a staggering $4.8 million, but that wasn’t good enough to hit the reserve, so it went unsold. With only 12 convertibles made for the ’71 Hemi ‘Cuda, its elusiveness, combined with its rare 426ci V-8 engine option and stunning style, makes it the most desired and valuable classic muscle car. Another rare thing about this amazing set of wheels is that Hagerty’s Concours condition value actually matches real-world sales at $3.8 million.
5 Muscle Cars That Quietly Became Million-Dollar Cars
These Golden Age muscle cars were once ordinary showroom purchases — and some have since sold for millions at auction.
1963 Pontiac Catalina Super Duty Swiss Cheese
Recent Auction Sales: 2
Clad in aluminum and featuring a frame with holes punched out, the 1963 Pontiac Catalina Super Duty “Swiss Cheese” factory drag car weighed just 3,300 pounds, which is amazingly light for a full-size boat. With an underrated 405-horsepower dual-quad 421ci V-8, this beast was capable of quarter-mile ETs in the 12s, which prompted GM to send Pontiac a cease and desist order regarding its production, as they were nervous about selling such a powerful car to the public.
Pontiac only managed to build 14 of these wonderfully ridiculous cars before GM put the kibosh on them, and just nine are known to still exist. Of those nine, just two have ever been sold at auction, both at Mecum Indy 2025. The first, which was built for Mickey Thompson, sold for $473,000, and the other, which was campaigned by Jim Wangers, reached $742,500 before closing. With values ranging from $205,000 to $567,000, the ’63 Swiss Cheese Pontiac is still underrated and overperforming.
1969 Pontiac Firebird Trans Am Convertible
Recent Auction Sales: 0
In 1969, Pontiac licensed the name of the Sports Car Club of America’s Trans-Am Racing Series for a special Firebird trim, and then proceeded to build a car that couldn’t qualify for competition. That’s okay, because the Trans-Am racing series had a 5.0-liter engine limit, while the ’69 Trans Am was packing a 400ci Ram Air IV, which made it one of the fastest GM muscle cars of the classic era. Pontiac produced 697 Trans Ams in 1969, but only two were convertibles, making them the rarest GM regular production muscle cars. So rare, in fact, that there is no evidence one has ever been sold at auction.
At Mecum Kissimmee 2016, two of these Holy Grails were listed, but neither of the sellers was willing to come off their reserves, so both headed home unsold. One reached a high bid of $1.4 million, and the other topped out at $1.9 million, leaving us to wonder what the reserves were for these two rare drop-tops. Hagerty places the Concours condition value for a ’69 Trans Am Ram Air IV convertible at $361,000, but that is clearly the undervaluation of the century.
Sources: Bring a Trailer, Hagerty, Mecum
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