The standard advice is that a dealer charges more for the same car, so buy private and pocket the difference. I checked what each side is actually selling.
| Seller | Listings | Average year | Average mileage | Average price |
|---|---|---|---|---|
| Dealer | 154,282 | 2015 | 110,607 | |
| Private owner | 78,326 | 2010 | 137,898 |
Five model years and 27,291 miles apart. The dealer car costs 90% more, and it's a substantially different car.
Most of the "markup" is the car
This doesn't mean dealer margin is imaginary — it exists, and we measured it properly by matching identical models in what the markup really costs. But when people quote the raw averages as proof they're being overcharged, they're mostly comparing a 2015 car with a 2010 one.
The reason is structural. Dealers get their stock from trade-ins and lease returns, which are by definition newer — a lease ends after three or four years and the car goes straight to a forecourt. Private sellers are people whose car has reached the end of its usefulness to them, which happens much later.
There's also a filter. Franchised dealers can't put a branded title on a certified lot, auctions route damaged stock elsewhere, and floor-plan lenders won't finance it. That's why private listings carry more salvage and rebuilt titles — 6.9% against 4.7%.
What this means practically
The two markets barely overlap, so the choice usually isn't "same car, two prices" — it's "which segment am I shopping in."
Under $10,000, private is where the cars are. Dealers rarely retail a fifteen-year-old car with 140,000 miles; it isn't worth the reconditioning and the warranty exposure. If that's your budget, the private market isn't the cheaper option, it's the only option.
Over $15,000, dealers dominate. Newer stock, financing, trade-ins, and the recourse that comes with a business having an address and a licence.
The overlap in the middle is where the advice actually applies. A three-to-seven-year-old car appears on both sides, and there the comparison is fair — same car, real markup, worth negotiating.
The risk sits where the cheap cars are
Older, higher-mileage cars sold by individuals is exactly the segment where the checks matter most, and it's also where they're hardest: only 15.8% of private listings publish a VIN against 69.4% of dealer ones, and disclosure falls further as the price drops — down to 10% under $5,000.
So ask for the number in the first message. Then run it through a free VIN check before you drive anywhere, because at this end of the market the paperwork is the entire risk. And remember the clock: a listing lasts under seven days, so the checking has to happen in minutes, not evenings.
Frequently asked questions
Do private sellers really sell cheaper cars?
They sell different cars. The average private listing is a 2010 model with 137,898 miles at $9,901; the average dealer listing is a 2015 with 110,607 miles at $18,774. Most of the price gap is the car, not the markup.
Why are dealer cars newer?
Their stock comes from trade-ins and lease returns, which are three to four years old by definition. Private sellers list cars when the car has stopped being useful to them, which happens much later.
When is buying private actually cheaper?
In the overlap — roughly three to seven-year-old cars that appear on both sides. Below $10,000 the private market isn't cheaper, it's the only place those cars are sold at all.
Is the private market riskier?
In two measurable ways: 6.9% of private listings carry a salvage or rebuilt title against 4.7% at dealers, and only 15.8% publish a VIN against 69.4%. The cars are also older, so there's more history to check.
Denis Kataev is a serial solopreneur and the founder of ForCar. With 15+ years in software engineering and 10 years in SEO, he builds data-driven products end to end — backed by a sharp eye for design. At ForCar he mines proprietary vehicle datasets, turning raw numbers into buying advice you can actually trust.
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