1970 Buick GS455 Sport Coupe with a built 455 and 4.10 posi, early bidding far under A-body 455 sales
$22,750 38% under market
A built, 40-years-owned GS455 with a clean title, bid at a fraction of what driver A-body 455 cars bring.
Every car we've picked stays here after the listing ends, with what it sold for or how high the bidding went. Below that is our running record of classic-car sales by condition, so you can see what a project, a driver or a show car really brings.
Parts car Valuable, but too rough to restoreProject Needs work, but worth savingDriver Looks good from ten feet and drivesCollector Original or numbers-matching, show qualityPro-build Restomod or pro-touring, built to modern standards Rare Few were built or few survive
$22,750 38% under market
A built, 40-years-owned GS455 with a clean title, bid at a fraction of what driver A-body 455 cars bring.
$20,865 34% under market
A rare Grand National cousin with the Limited trim and leather, but it has a body kit and the A/C needs work.
| Condition | Sales | Low | Typical | High |
|---|---|---|---|---|
| Driver | 8 | $14,873 | $33,170 | $46,278 |
| Collector | 7 | $23,250 | $52,800 | $61,500 |
| Car | Condition | Result | Date | Where |
|---|---|---|---|---|
| 1970 Buick GS455 Sport Coupe with a built 455 and 4.10 posi, early bidding far under A-body 455 sales | Driver | $22,750 | Nov 12, 2026 | Hagerty Marketplace |
| 1970 GS 455 Stage 1 | Collector | $52,800 | Oct 23, 2026 | Mecum |
| 1972 GS 455 | Collector | $59,400 | Oct 23, 2026 | Mecum |
| 1987 Buick Regal Turbo-T Limited, one of 1,035, 50k miles | Driver | $20,865 | Oct 13, 2026 | Hagerty Marketplace |
| 1970 Buick GS 455 | Collector | $31,250 | Oct 8, 2026 | Bring a Trailer |
| 1987 Buick Grand National | Driver | $46,278 | Sep 17, 2026 | Hagerty Marketplace |
| 1970 Buick GS 455 | Collector | $23,250 | Sep 11, 2026 | Bring a Trailer |
| 1970 Skylark Custom sport coupe | Driver | $14,873 | Aug 31, 2026 | Hagerty Marketplace |
| 1972 Buick GS 455 Stage 1 | Collector | $61,500 | Aug 31, 2026 | Bring a Trailer |
| 1987 Grand National, 30 years owned | Driver | $26,000 | Aug 17, 2026 | Hagerty Marketplace |
| 1971 Buick GS 455 | Collector | $41,500 | Jun 27, 2026 | Bring a Trailer |
| 1969 GS400 Stage 1 convertible | Driver | $42,800 | Apr 23, 2026 | Hagerty Marketplace |
| 1972 GS 455 | Driver | $42,000 | Mar 2, 2026 | Bring a Trailer |
| 1969 Skylark GS 400 Stage 1 4-speed project | Project | $15,750 | Feb 3, 2026 | Hagerty Marketplace |
| 1972 Buick GS 455 hardtop, auto | Collector | $60,500 | Jan 18, 2026 | Mecum |
| 1970 Buick GS 455 Stage 1 convertible, restored | Collector | $120,000 | Nov 12, 2025 | Hagerty Marketplace |
| 1970 Skylark convertible GSX tribute | Driver | $34,240 | Aug 27, 2025 | Hagerty Marketplace |
| 1971 Buick GS 350 coupe | Driver | $30,763 | Jul 22, 2025 | Hagerty Marketplace |
| 1969 GS 400 convertible | Driver | $32,100 | Jan 6, 2025 | Hagerty Marketplace |
Each find is compared with recent sales of the same car in the same condition: a project against project sales, a show car against show cars. It has to come in at least 20% under, or be rare enough to be worth knowing about. Then we read the listing for red flags. We don't inspect the cars, so see one in person or pay for an inspection, never wire money to hold a car, and make sure the VIN on the title matches the car.
Found one we missed, on Facebook Marketplace, Craigslist or anywhere else? Send us the link.
The best classic-car finds we spot on eBay, Marketplace and Craigslist, plus new build guides. One email a week.