How much of the market do you see?

We monitor 264,000+ cars on sale across Australia continuously, 228,068 of them dealer cars, at the last weekly count. Private listings and auction catalogues are monitored too, but only dealer cars set a price.

How often is it updated?

Listings are monitored continuously. Every dealer's advertised stock is revalued each night, and the wider market is revalued on a rolling cycle so no car's value is more than three days old.

How do you stop the same car being counted twice?

Where a car carries a 17-character VIN, the VIN is its identity, and 96.4% of live dealer stock has one. A car listed on several sites, or moved between yards, is still one car, placed to the dealership rooftop that holds it.

How do you know a car has sold?

A sale is recorded when a car is withdrawn from advertising after a period on the market. Each one is checked against the car's price history, and relists and moves between dealers are taken back out. It's an inferred sale, not a confirmed transaction.

How do you match the exact model and variant?

Every listing is matched to a standard catalogue of makes, models, series and variants. Where an ad leaves a detail out and the variant only came one way, we fill it in and mark it as implied, and we never overwrite what the ad states. Cars we can't resolve to a variant run at about twice the error, and their confidence grade says so.

How do kilometres come into it?

The value comes off a market curve of price against kilometres, drawn through comparable cars and weighted towards the most recent. The curve never rises as the kilometres go up.

Can you see discounts?

We keep every price change on every ad, more than 5 million price observations since May 2026, so price cuts before a car sells are in the record. What's negotiated after the last advertised price isn't visible to us, which is why we measure against the last advertised price.

How many comparable cars do you need?

At least 10 dealer cars, sold or listed, of the same make and model in its model year, give or take one. With fewer, the engine returns no value and says why. In the app, if it's the car's series that leaves too few, we value it on its year and variant instead and say so. Where the car's own variant has 15 or more covering its kilometres, the value comes off that variant's own curve. Every value carries a range and a confidence grade built from how many comparables sit near the car's kilometres and how closely they match it.

On 7,314 dealer cars recorded as sold 19 October to 2 November 2026, each valued on the night its sale was recorded, before the nightly refresh, the median error was 4.4%, 77% were within 10%, and 99.2% were given a value. Each car’s own advertisement was still among the evidence, so this reads better than a test with it taken out. It's a median, not a promise about any one car. Every test we've published is on the accuracy page.

Data and method

How the numbers are made

Where our data comes from, how a value is built, and how we check it. Written for anyone who wants to check our working, and every figure on this page comes from our own database.

Where the data comes from

We monitor the advertised stock of 264,000+ cars on sale across Australia continuously, 228,068 of them dealer cars. We also monitor private listings and auction catalogues. Those feed Sourcing and Auctions; they don’t set any price.

Dealer cars

Australia-wide

Used to price?: Yes

228,068cars

Private listings

Western Australia today

Used to price?: No. Valued against the dealer market

33,183cars

WA only measured currently

Auctions

Australia-wide catalogues

Used to price?: No. Valued against the dealer market

2,608lots

Counts as at 10 November 2026.

Why only dealer cars set the price

Our customers are dealers, so the value we give a car is a dealer retail value: what a dealer can ask for it and sell it for. That value is built only from what dealers are asking and what dealers have sold.

Private sales and auction results run at different prices for good reasons. A private seller hasn’t reconditioned the car or given a warranty, and an auction hammer is a wholesale price. Mixing them in would pull the value away from what a dealer can actually get. So we value private listings and auction lots against the dealer market, which is what makes the margin on a Sourcing card or an auction bid meaningful, but they never feed the curve.

One car, one record

Every listing is matched to a standard catalogue of makes, models, series and variants, so the same car reads the same way whichever site lists it. Where a car carries a 17-character VIN, the VIN is its identity: 96.4% of live dealer stock is identified by VIN, and stock is placed to the individual dealership rooftop that holds it, not just the dealer group.

Where an ad leaves a detail out and the catalogue says the variant only came one way, we fill it in from the catalogue and mark it as implied. We never overwrite what an ad states.

How a sale is recorded

A sale is recorded when a car is withdrawn from advertising after a period on the market. We check each one against the car’s price history, and relists and moves between dealers are taken back out. 600,000+ dealer sales have been recorded since 1 March 2026.

Prices are the advertised price. Drive-away prices are converted to an excluding-government-charges basis, so every car sits on the same footing. We’ve kept more than 5 million price observations since May 2026, so most sold cars carry their full asking-price history.

How a value is made

Find the cohort.
Dealer cars of the same make, model, year, series and fuel, sold and still listed. The engine sits on 610,000+ of these observations tonight.
Draw the curve.
A market curve of price against kilometres through those cars, weighted towards the most recent, which never rises as the kilometres go up.
Use the variant where it’s thick enough.
Where the car’s own variant has 15 or more comparable dealer cars covering its kilometres, the value comes off that variant’s own curve.
Adjust for spec.
Differences like body, drive, transmission and engine are added back only where they genuinely vary in that cohort.
Grade it.
Every value carries a range, from the 10th to the 90th percentile, and a confidence grade built from how many comparables sit near the car’s kilometres and in total, and how closely they match it: its own variant or the wider model, and whether its series and trim are known.
Or say no.
With fewer than 10 comparable dealer cars, sold or listed, of the same make and model in its model year (give or take one), the engine returns no value and says why. In the app, if it’s the car’s series that leaves too few, we value it on its year and variant instead and say so.

A 2021 Toyota RAV4 against 104 cars of the same variant across the odometer, with the market and variant curves — What it looks like in the app: a 2021 RAV4 against 104 of its variant, sold and still listed, with the curve our value comes off.

How we measure it

Tested on 7,314 dealer cars recorded as sold 19 October to 2 November 2026, each valued by our live engine on the night its sale was recorded, before the nightly refresh. Cars are ones where we know the exact model variant. Error is the difference from the last price each car was advertised at before it sold. We use four measures, because a median alone hides the misses.

Table 1

Accuracy on 7,314 dealer cars recorded as sold 19 October to 2 November 2026, on recent dealer sales
Measure	On recent dealer sales
Coverage (cars given a value)	99.2%
Median error	4.4%
90th percentile error (where the worst 10% start)	16.4%
Within 10%	77.4%

Each car’s own advertisement was still among the evidence, so this reads better than a test with it taken out.

Testing on recent dealer sales, each valued with its sale kept out of the evidence, matters, because that’s how you use it: you value a car before it sells. Cars the engine has already seen sell would flatter the result, so the figures we quote are always from sales kept out of the evidence. Every test on recent dealer sales, and every run on the standing 500 marked as not an accuracy claim, is listed on the accuracy page. Every change to the engine is also scored on a standing set of 500 sold cars before it goes live, and each change keeps a named way back.

Table 2

Accuracy rises with price. The same 7,314 cars, split by the last price each was advertised at:

Accuracy by price band on the same 7,314 cars
Price	Cars	Valued	Median error	Worst 10% from	Within 10%
Under $15,000	939	97.2%	9.9%	32.9%	50.5%
$15,000 to $30,000	2336	99.7%	5.1%	17.2%	73.1%
$30,000 to $50,000	2387	99.5%	3.6%	11.7%	85.2%
$50,000 and over	1652	99.0%	3.5%	11.0%	87.2%
All cars	7,314	99.2%	4.4%	16.4%	77.4%

When it runs

Through the day: Dealer websites, private listings and auction catalogues are monitored.
After midnight, Perth time: The market evidence is rebuilt, then every dealer’s advertised stock is revalued.
Overnight: The wider market for Sourcing is revalued on a rolling cycle, about half of it each night, so no car’s value is more than three days old. New stock is valued the night it appears.

So what you see in the morning is last night’s market, not this minute’s.

What we don’t claim

Sales are inferred from withdrawal, not confirmed transactions.
Auction results are inferred from the catalogue. We don’t have hammer prices.
Private listings cover Western Australia today, not the country.
Values reflect the previous night’s market.
The 4.4% figure is a median on variant-resolved cars. It isn’t a promise about any one car.
Write-off flags on private ads come from what the seller wrote, and the salvage check covers the salvage sales we’ve seen since 27 August 2026 (36,013 VINs). Neither replaces a PPSR or written-off register search.

How we handle data

We monitor publicly advertised vehicles: the car, its price, its photos and the ad’s description.
We don’t hold buyers’ details, and we don’t contact private sellers.
What a dealership enters in the app, including its pricing rules, targets, notes, appraisals and customers, belongs to that dealership and isn’t shown to other dealers.
Want a listing or its photos removed? Email hello@motormetrics.com.au and we’ll take it out.

Questions buyers of our data ask

Is your value an advertised price or a sale price?: It's a dealer retail value: what a dealer can ask for the car and sell it for. It's built from what dealers are asking and what dealers have sold, and we measure it against the last price each car was advertised at before it sold. More in 2.0
How much of the market do you see?: We monitor 264,000+ cars on sale across Australia continuously, 228,068 of them dealer cars, at the last weekly count. Private listings and auction catalogues are monitored too, but only dealer cars set a price. More in 1.0
How often is it updated?: Listings are monitored continuously. Every dealer's advertised stock is revalued each night, and the wider market is revalued on a rolling cycle so no car's value is more than three days old. More in 7.0
How do you stop the same car being counted twice?: Where a car carries a 17-character VIN, the VIN is its identity, and 96.4% of live dealer stock has one. A car listed on several sites, or moved between yards, is still one car, placed to the dealership rooftop that holds it. More in 3.0
How do you know a car has sold?: A sale is recorded when a car is withdrawn from advertising after a period on the market. Each one is checked against the car's price history, and relists and moves between dealers are taken back out. It's an inferred sale, not a confirmed transaction. More in 4.0
How do you match the exact model and variant?: Every listing is matched to a standard catalogue of makes, models, series and variants. Where an ad leaves a detail out and the variant only came one way, we fill it in and mark it as implied, and we never overwrite what the ad states. Cars we can't resolve to a variant run at about twice the error, and their confidence grade says so. More in 3.0
How do kilometres come into it?: The value comes off a market curve of price against kilometres, drawn through comparable cars and weighted towards the most recent. The curve never rises as the kilometres go up. More in 5.0
Do you use drive-away prices?: Drive-away prices are converted to an excluding-government-charges basis, so every car is compared on the same footing. More in 4.0
Can you see discounts?: We keep every price change on every ad, more than 5 million price observations since May 2026, so price cuts before a car sells are in the record. What's negotiated after the last advertised price isn't visible to us, which is why we measure against the last advertised price. More in 4.0
How many comparable cars do you need?: At least 10 dealer cars, sold or listed, of the same make and model in its model year, give or take one. With fewer, the engine returns no value and says why. In the app, if it's the car's series that leaves too few, we value it on its year and variant instead and say so. Where the car's own variant has 15 or more covering its kilometres, the value comes off that variant's own curve. Every value carries a range and a confidence grade built from how many comparables sit near the car's kilometres and how closely they match it. More in 5.0
How accurate is it?: On 7,314 dealer cars recorded as sold 19 October to 2 November 2026, each valued on the night its sale was recorded, before the nightly refresh, the median error was 4.4%, 77% were within 10%, and 99.2% were given a value. Each car’s own advertisement was still among the evidence, so this reads better than a test with it taken out. It's a median, not a promise about any one car. Every test we've published is on the accuracy page. More in 6.0

Questions about the method? Ask us. We’d rather you asked than assumed.

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