Quick answer
For the same model year, dealers ask 71 points more than private sellers.
Cadillac STS price by model year
| Year | Typical price | Spread | Listings |
|---|---|---|---|
| 2011 | — | 8 | |
| 2008 | — | 6 | |
| 2007 | — | 9 |
ROWS 3·SOURCE Live classified listings
Dealer or private seller
On the Cadillac STS the dealer markup works out at 71% over a private sale of the same year.
| Seller | Listings | vs median year | Average asked |
|---|---|---|---|
| Private seller | 50 | +64.4% | $4,762 |
| Dealer | 25 | +135.6% | $5,476 |
ROWS 2·SOURCE Live listings, normalized per model year
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Everything on the Cadillac STS
Recalls14 campaignsFuel economy21 mpg bestReliability3.5/5Common problems371 complaintsCheck a VINAgainst this exact buildDimensionsSize, weight, generationsCargo space14 cu ftWhat yours is worthValue by year & mileageInsurance costEstimated per yearWindow stickerOriginal Monroney labelDecode a VINWhat each character meansAbout this car2005–2011
Frequently asked questions
How much does a used Cadillac STS cost?
The median asking price is $3,800 across 85 live listings. A 2007 asks about $2,999 and a 2011 about $3,000. To price one car by its year and mileage, use the Cadillac STS valuation tool.
Is it cheaper to buy a STS from a private seller?
Yes. Against the median for the same model year, dealers ask 135.6% above and private sellers 64.4% above.
Asking prices from live classified listings, normalized against the median for each model year. Slices below a minimum listing count are omitted. Asking prices exceed transaction prices (how we count). Last updated Nov 2026. — ForCar Reviewed by Denis Kataev, founder of ForCar.
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