Low-Mileage 1969 Ford Mustang Boss 429 Nets Half a Million at Auction

A rare Mustang produced for only two model years (1969-1970), the Boss 429 has been a six-figure classic for many years. Nowadays, it's surprising when a nicely maintained example sells for less than $300,000. Well, this Wimbledon White had the feats to push the bidding war far beyond that mark. The fastback sold for $550,000, including the buyer's premium.

What makes this Boss 429 worth half a million dollars? For starters, it's pretty much flawless thanks to a comprehensive restoration that was completed in 2024. The Mustang looks like it just rolled off the showrooms floor (a feat that also extends under the hood).

In addition to a pristine appearance, this Mustang rocks a numbers-matching drivetrain. This includes the 429-cubic-inch (7.0-liter) Boss engine and the close-ratio, four-speed Toploader manual transmission. The latter still mates with the original nine-inch, 3.81 Traction-Lok rear axle.

Although it did get some NOS parts during the restoration, this Boss 429 remains highly original. It still has the factory sheet metal, the original door tag, and the space-saver tire and jack assembly. The correct assembly line paint and chalk marks were redone during the restoration.

Its ownership history is well documented, and the car comes with a ton for original documentation. The list includes a build sheet, two original dealer invoices, a Ford warranty card, owner’s manuals, previous titles, and an Elite Marti Report.

And of course, there's also the fact that the Boss 429 is a rare classic. Ford sold only 1,358 units over two model years, and this fastback is one of 859 examples produced in 1969. Wimbledon White is one of only five colors offered that year, and some experts claim that only 271 cars were ordered in this hue.

And, of course, there's the fact that the Boss 429 packs Ford's most potent mill from the golden era. Developed for NASCAR, the 429-cubic-inch Boss engine found its way in the road-going Mustang simply because Ford needed to homologate it for competition.

The street-legal version delivered 375 horsepower and 450 pound-feet (610 Nm) of torque. For reference, the 428-cubic-inch (7.0-liter) Cobra Jet V8 came with 335 horsepower and 440 pound-feet (597 Nm) of twist on tap.

At $550,000, this Boss 429 is among the most expensive examples ever auctioned, but it was notably more affordable than the record-setting, unrestored 1969 fastback that fetched $1.04 million in June 2026. A pair of 1969/1970 models fetched $660,000 a pop at Indy 2026.

The Boss 429 was the second most expensive vehicle auctioned off at Harrisburg 2026. It was superseded by a 2026 Chevrolet Corvette ZR1 Stars & Steel Edition that fetched $561,000.