Whether you're selling, part-exchanging, or just curious, knowing what your car is worth is the starting point for any decision. The good news is you don't need to pay for a valuation — with the right approach, you can get a pretty accurate number for free in about 15 minutes.
What Affects Your Car's Value?
Used car values aren't random. The main factors:
- Age and mileage — the two biggest factors. Higher mileage and older age reduce value, but the relationship isn't linear. A well-maintained 80,000-mile car can be worth more than a poorly-maintained 40,000-mile one.
- Service history — a full documented service history adds genuine value. No history subtracts from it.
- Number of owners — fewer previous owners is better, all else equal
- Condition — interior and exterior wear, any accident damage, MOT advisories
- Spec and options — navigation, leather, panoramic roof all add value on premium models; less so on budget cars
- Colour — mainstream colours (silver, black, white, grey) sell faster and hold value better than unusual colours
- Market conditions — supply and demand shift constantly. Post-pandemic, used car prices were unusually high. They've been normalising since 2023.
How to Get a Free Valuation
Method 1: Compare Active Listings (Most Accurate)
Search AllCarsUK, AutoTrader, and Motors.co.uk for your exact car — same make, model, year, mileage, and ideally the same trim level and colour. Look at 8–10 comparable examples. Ignore the outliers at each end. The middle cluster is your realistic market value.
This is more accurate than any algorithm because it shows you what buyers are actually being asked to pay right now.
Method 2: Free Online Valuation Tools
Sites like Motorway, We Buy Any Car, and Cazoo offer free instant valuations. These give you a trade value (what a dealer would pay) rather than a retail value (what you can sell for privately). Expect private sale value to be 10–25% higher than these quotes.
Method 3: Get Multiple Trade Quotes
Getting quotes from 3–4 trade buyers (We Buy Any Car, Motorway, Cazoo, your local dealer) tells you the floor price — the minimum you should accept in a private sale. If a private buyer offers below the best trade quote, walk away.
Private Sale vs Part-Exchange vs Trade Buyer
| Method | Price You'll Get | Effort Required |
|---|---|---|
| Private sale | Highest (retail price) | High |
| Part-exchange at dealer | Middle | Low |
| Trade buyer (WBAC, Motorway) | Lowest (trade price) | Very low |
When Values Drop — Things to Know
- Cars lose most value in the first 3 years — after that, depreciation slows significantly
- Diesel values have softened in recent years as CAZ concerns grow
- Plate changes (March, September) affect new car demand which ripples into the used market
- A car that's just passed its MOT is worth slightly more than one due in a month
Ready to sell? List your car free on AllCarsUK and reach buyers across the UK — or browse what similar cars are selling for right now.