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A Cameo Ivory 1966 Pontiac GTO hardtop coupe that has spent the last 26 years with a single Michigan owner is now up for grabs in a no-reserve auction on Hagerty Marketplace. Bidding sits at $23,500 with about five days left on the clock, and the listing includes more than 100 photos documenting a numbers-matching 389 fitted with the desirable Tri-Power induction setup.
Pontiac spun the GTO off from its Tempest-based performance package into its own model line for 1966, and chief engineer John Z. DeLorean's creation adopted the era's swoopy "Coke-bottle" bodywork along with stacked headlights and a more upscale cabin. This particular coupe left Fisher Body's Fremont, California plant during the third week of July 1966 as a 389/360-hp Tri-Power car backed by a four-speed manual, and it still wears its factory Cameo Ivory paint over a Parchment and black interior. Standout details include an Equus Pro Tach, a woodgrain-trimmed console, chrome-ringed 14-inch wheels with GTO wheel covers, and an aftermarket AM/FM cassette deck, plus the original owner's manual and warranty booklet.
The seller says the current owner bought the GTO in March 2000 and has held onto it ever since, a two-and-a-half-decade stretch of stewardship that's increasingly rare for a muscle car of this caliber. It comes with a clean Michigan title in the owner's name, along with a spare tire and cover and the original passenger-side floor mat. A few bidders in the comments have pressed the seller for more detail on the cylinder heads fitted to the engine, a good reminder that even a well-documented, decades-old survivor is worth a close inspection before the auction closes on Monday, August 17.
Pontiac built 19,045 GTOs with the 360-hp Tri-Power engine in 1966 out of nearly 97,000 GTOs that model year, making it a meaningfully rarer option than the standard 335-hp four-barrel car. Hagerty's Valuation Tools currently price a #3 (Good) condition 1966 GTO hardtop coupe with Tri-Power power at roughly $39,000, up 7.1% recently, compared with about $23,400 for an otherwise similar four-barrel car, and Hagerty's own adjustment calculator adds another 15% of value for the factory four-speed transmission this car carries. Recent comparable sales back up that spread: a 1966 GTO changed hands for $60,776 on Hagerty Marketplace in late July, and another example brought $121,000 at a Mecum sale the same week. Against that backdrop, this Tri-Power hardtop's current $23,500 bid still looks like it has plenty of room to run before the gavel falls.
Craig Zimmerman is handling the sale on behalf of the owner and has been actively answering bidder questions throughout the auction. Readers who want to see how other Pontiacs from this era are trading can check out our rundown of the 10 coolest Pontiac GTOs for sale on Motorious, take a look at this Tri-Power-adjacent 1967 GTO convertible with racing history that surfaced on Hagerty Marketplace, or see how a numbers-matching 1978 Trans Am W72/WS6 is faring in its own no-reserve sale. For another look at how Hagerty's valuation data can put a car's asking price in context, our recent story on a 427-powered Corvette Z06 GTR walks through the same approach.
