Car Valuation Explained

Know what any used car is really worth — and how to use that knowledge to pay the right price.

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Explained

What Is a Vehicle Valuation?

A valuation is an estimate of what a vehicle is worth right now, based on real market data, condition factors and comparable sales.

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Market Range

We provide a min/max range rather than a single number — because the same car can be worth £3,000 more at a dealer than at a private auction.

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Data Sources

We use comparable listings across major UK classified sites, auction house data, and dealer forecourt pricing — updated continuously.

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Adjusted for History

Our valuation is adjusted based on the vehicle's specific history — not just make, model and mileage. A CAT N write-off is worth thousands less than a clean car.

The Four Channels

What the Price Depends On

The same car has four different values depending on how it's being sold.

Channel Typical Premium Who Pays This Notes
Dealer Forecourt Highest (+15–25%) Retail buyers Warranty, finance, consumer rights. You pay for the safety net.
Private Sale Mid Market Private buyers No warranty. Buyer beware. Price should reflect risk.
Part Exchange Trade (-10–15%) Dealers only Dealer needs margin. Good for convenience, bad for value.
Quick / Auction Sale Lowest (-20–30%) Cash buyers Speed over price. Used when urgency outweighs return.
Key Factors

What Adds or Removes Value

These are the variables our system applies to adjust the baseline price for each specific vehicle.

⇧ Value Increases

Low Mileage

Under 10,000 miles/year is significantly below average. Adds 5–15% to value depending on the model.

Full Service History

Stamped logbook with receipts adds buyer confidence and £500–£2,000 to desirable models.

Popular Colour

Silver, black, and white outsell unusual colours by 3:1. An unusual colour can shave 2–5% off value.

High Specification

Desirable factory options (sat nav, heated seats, panoramic roof) add £500–£3,000 vs base spec.

⇩ Value Decreases

Write-Off History (CAT N/S)

CAT N typically reduces value by 20–40%. CAT S is worse. Both affect insurance premiums indefinitely.

Typical deduction: -£2,000–£5,000
Mileage Discrepancy

Even if legitimate (cluster replacement), an unexplained mileage drop kills buyer confidence and sale price.

Typical deduction: -£1,500–£3,000
Taxi / Commercial Use

Intensive stop-start urban driving accelerates clutch, gearbox and brake wear. Often undisclosed.

Typical deduction: -£1,000–£2,000
Outstanding Finance

The finance company has legal claim to the car. You could lose it. Should be cleared by seller before completion.

Legal risk — not just a price issue
Real Example

How Our Valuation Works in Practice

Using our sample report Mercedes E63 AMG as a worked example.

2018 Mercedes E63 AMG Estate — 74,630 miles

Clean comparable: approx £25,000–£27,000

High mileage (74k vs 40k avg)-£2,500
CAT N write-off (front end, 2022)-£3,500
Mileage anomaly (-5,027 miles)-£2,000
Recent TfL taxi use (2024–2025)-£1,500
Model desirability (E63 AMG is sought-after)+£2,000
Adjusted Realistic Range
£18,500–£20,000
vs Asking Price
£21,600
Negotiating

How to Use Valuation Data

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Lead With the Report

Print the valuation section. Show the seller the specific adjustments with their justification. It's harder to argue with data than with gut feeling.

Target One Deduction at a Time

Don't throw everything at them at once. Start with the biggest single issue (finance, CAT N, mileage discrepancy) and negotiate that down before moving to the next.

Use Upcoming Costs

If the report shows an overdue service or approaching major maintenance, that's legitimate and quantifiable. Get a quote from a garage before negotiating.

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Walk Away Power

If the seller won't budge on a car with documented issues, walk away. A Premium report costs £12.99. A bad car costs thousands. The maths is simple.

Get a full valuation in your report

Our Premium report includes a personalised valuation range, adjusted for that vehicle's specific history, with a full breakdown of every deduction.

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