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Finding a used car becomes easier when you know what your money should buy. A national average gives you some context, although perhaps a better question is whether a particular car offers good value for your budget and the journeys you make.
Before browsing, decide what you need: Enough room for passengers, a manageable insurance bill or comfortable motorway driving. Extras can wait. The strongest purchase is a car you can afford to maintain and enjoy using.
What is the average UK used car price?
The average advertised price of a used car in the UK was £17,299 in September 2026, according to Autotrader’s Retail Price Index, published on October 9.
That measures advertised retail prices, so the final amount paid may differ.
A separate Carplus study of 85,726 UK listings from summer 2026 found a median average asking price of £15,495. Half its listings fell between £11,449 and £20,498. The median is the ‘middle’ price, with half the sample above it and half below.
The reports use different samples, periods and calculations, so comparing these figures cannot show whether prices rose between summer and September.
For your shortlist, use adverts for comparable cars, as being below a national benchmark does not automatically make a car good value.
Are used car prices rising or falling?
Autotrader reported that September 2026 prices fell 1% compared with a year earlier and 0.8% compared with August, after adjusting for changes in the mix of cars advertised.
If you are buying a household car with a partner, compare similar listings and agree on a borrowing budget together. You could consider co-applicant car finance, where both people apply for the agreement. Check the APR and total payable, and understand that either borrower can be responsible for the full outstanding debt.
Price changes varied across the market. Electric cars recorded annual growth, while petrol and diesel prices declined, so your shortlist matters more than the headline average.
Choose a car with convincing maintenance records and manageable repayments. Allow room for insurance and repairs when deciding what you can afford.
Average used car prices by fuel type
These averages show the differences between fuel categories in September 2026.
| Fuel type | Average advertised price |
| Petrol | £14,625 |
| Diesel | £13,924 |
| Electric | £25,091 |
Source: Autotrader Retail Price Index. These categories contain different mixes of models and ages, so the figures do not compare equivalent cars.
Choose fuel type around your routine. If you are considering an electric car, check where you would charge, the tariffs you would pay and whether its real-world range suits your longest regular journeys.
For petrol or diesel, compare expected fuel costs using your annual mileage. A cheaper purchase can lose its appeal once you calculate what it costs to use.
Paying extra for technology you cannot conveniently use makes little sense. Convenience belongs in the value calculation too.
How age and mileage affect price
Carplus identified age and make/model as the strongest price factors in its sample, followed by mileage. Its model estimated roughly £1416 less for an additional 10,000 miles, with other measured factors held constant. Treat that as a guide from the study, rather than a fixed discount for every car.
Compare the mileage with service invoices and recorded MoT readings. GOV.UK’s free MoT history service shows recorded mileage, test results and previous failures or advisories.
Look for evidence that maintenance followed the manufacturer’s schedule. Ask when the next major service is due and whether scheduled items, such as a timing belt where fitted, have been replaced. Give documented maintenance more weight than a particularly low odometer reading. A slightly higher-mileage car with clear records can be the more convincing purchase.
Before choosing an older premium model, price its tyres, servicing and common repairs. The badge may become affordable long before its upkeep does.
How to tell whether a used car is fairly priced
Start with a handful of adverts for the same model, engine, gearbox and trim. Keep age and mileage reasonably close, then separate dealer listings from private sales.
Carplus found median prices of roughly £19,000 for automatics and £12,000 for manuals. Much of that gap reflected newer, more expensive models in the automatic group, so comparing the same model and age gives you a fairer picture of the gearbox premium.
Ask for the total purchase price in writing, alongside any work promised before collection. Then compare what each car needs during its first year. For example, a car costing £500 less offers little saving if it immediately needs £800 of work.
If one car looks unusually cheap, investigate the reason. Missing history, damage records or unresolved faults deserve an explanation before you travel.
What to check before buying
Check the paperwork before getting attached to the car, then inspect it in daylight and take an insured test drive. GOV.UK and Citizens Advice recommend checking vehicle details, history and condition before purchase.
- Documents: Match the registration and vehicle identification number to the V5C logbook and DVLA details
- MoT history: Look for mileage inconsistencies, repeated failures and recurring advisories
- Service records: Ask for invoices showing dates, mileage and completed work
- History check: Check for outstanding finance, theft records and insurance write-offs through a suitable paid service
- Condition: Examine tyres, bodywork and signs of leaks, then try the lights, windows and air conditioning
- Test drive: Check steering, braking, gear changes and unusual noises, with insurance confirmed beforehand.
A fresh MoT gives you useful information about the test result. You still need to assess maintenance and how the car behaves. When something feels wrong, pause. An independent inspection is sensible if you cannot judge the condition yourself.
What other costs should you budget for?
Get an insurance quote for the exact car before paying a deposit. A model that fits your purchase budget may be uncomfortable to insure.
Next, calculate fuel or charging, servicing, tyres and likely repairs. Add vehicle tax, parking and any applicable local driving charges or tolls. Vehicle tax does not transfer from the seller, so you need to arrange it when buying.
Leave some money available for unexpected work rather than spending every pound on the car itself. That matters particularly when buying an older vehicle without much financial breathing room.
And ask about costs already approaching, including the next service or worn tyres. Buying slightly below your maximum budget gives you room to deal with them.
Should you buy private or from a dealer… and can you use finance?
A reputable dealer is often worth considering if you want a clearer route for resolving problems. Buying from a business gives you stronger consumer protection. A private seller must describe the car accurately, but your rights are more limited.
Finance is a separate decision about payment. Compare the deposit, annual percentage rate (APR), fees and total payable, alongside the monthly instalment. With hire purchase, ownership normally passes after the final payment and any purchase fee. Personal Contract Purchase (PCP) requires an optional final balloon payment if you want to keep the car; mileage and condition charges can apply when returning it.
Choose the car first, then assess how comfortably you can pay for it. A manageable monthly payment deserves scrutiny if it stretches repayments or leaves a final bill you have no plan to cover.
