What does the report check?

The full spec sheet, the listing history (how long it has been for sale and where), every price change, dealer churn, mileage progression across listings, and computed red flags. It ends in a green, yellow or red verdict, and frames the asking price against market value when you give it.

What red flags does it check?

A car that has passed through three or more dealer groups or appeared in three or more states, three or more price cuts in the current listing, odometer readings that drop between listings or sit far out of line with the rest of its history, and a car listed four or more times.

Is this a title or accident history report?

No. It is built from MarketCheck’s listing history, not from title or insurance records. It tells you how the car has been marketed and priced. Pair it with a title history report if you need accident or title-brand records.

The VIN. Add the asking price and your ZIP to see asking versus market value, and the odometer if the listing shows a stale reading.

What do I do next if it looks good?

Run the Pre-Purchase Negotiation Brief on the same VIN for a target offer, a walk-away price and a script built on the cheaper comparables nearby.

$1.49 per VIN. Connect the MarketCheck AI Desk to Claude or ChatGPT once and ask in plain English, or run it from this website. You pay per report from a credit balance, with no subscription. You can also buy a single report as a guest.

All reports

For Car Shopper

Check a used car by VIN before you buy

A used car health check by VIN reads the car's listing history before you buy: how long it has been for sale and where, every price change, how many dealers it passed through, whether the mileage progression holds up, and the asking price against market value. It ends in a green, yellow or red verdict and costs $1.49.

What you get

Full spec sheet
Listing history
Price changes over time
Status changes
Hidden red flags

See a sample report

You provide

Required

VIN
17-character vehicle identification number.

Recommended (improves accuracy)

Listed price (USD)
Current asking price on the listing the user is considering.
ZIP
ZIP code where the user is shopping.

Optional (1)

Miles

What your assistant shows back

The interactive report Claude and ChatGPT show in the chat, built on live MarketCheck data. Every run also returns a shareable link to the same report.

You

I'm thinking of buying VIN 4T3R6RFV7MU015349, listed at $36,903. Vet it for me. I'm shopping in 60601.

Claude

via MarketCheck data

Try a prompt in Claude or ChatGPT

Each one opens a new chat with the prompt filled in. Swap in your own details.

I'm thinking of buying VIN 4T3R6RFV7MU015349, listed at $36,903. Vet it for me. I'm shopping in 60601.
Open in Claude Open in ChatGPT
Is VIN 5YFB4MDE8RP121789 a good buy at $19,999?
Open in Claude Open in ChatGPT

Who runs the Used Car Health Check

Shoppers who found one car and want to know if the asking price and the history hold up.
Buyers comparing a couple of finalists before the test drive.
Anyone who wants the listing history a dealer would rather not show.

Before you run it

What does the report check?: The full spec sheet, the listing history (how long it has been for sale and where), every price change, dealer churn, mileage progression across listings, and computed red flags. It ends in a green, yellow or red verdict, and frames the asking price against market value when you give it.
What red flags does it check?: A car that has passed through three or more dealer groups or appeared in three or more states, three or more price cuts in the current listing, odometer readings that drop between listings or sit far out of line with the rest of its history, and a car listed four or more times.
Is this a title or accident history report?: No. It is built from MarketCheck’s listing history, not from title or insurance records. It tells you how the car has been marketed and priced. Pair it with a title history report if you need accident or title-brand records.
What do I need?: The VIN. Add the asking price and your ZIP to see asking versus market value, and the odometer if the listing shows a stale reading.
What do I do next if it looks good?: Run the Pre-Purchase Negotiation Brief on the same VIN for a target offer, a walk-away price and a script built on the cheaper comparables nearby.
What does it cost?: $1.49 per VIN. Connect the MarketCheck AI Desk to Claude or ChatGPT once and ask in plain English, or run it from this website. You pay per report from a credit balance, with no subscription. You can also buy a single report as a guest.

Want programmatic access to the reports? Technical reference (inputs, outputs, the MCP tool name): Used Car Health Check documentation.

Reports that pair with this one

Pre-Purchase Negotiation Brief

What to offer for a specific listing and the exact script to use.

$1.99 per run

Vehicle Valuation Report

One VIN in full depth: valuation with the comparable evidence behind it.

$1.99 per run

Trade-In Valuation Report

What your car is worth as a trade-in vs private sale vs retail.

$1.49 per run

The data underneath

Run the Used Car Health Check

$1.49 per run. Run it here, or connect Claude or ChatGPT and ask in plain English.

Run this report Add to Claude Add to ChatGPT