Decide before you bid.
CarMargin reads every Copart UK lot you open. Damage scored from the photos, MOT history checked for mileage fraud, repair plan with line items, and a chat that cites the photo or listing field it's looking at. In your browser, while you browse.
What it does, in three passes.
Three ways CarMargin saves you from a bad bid — running together on every lot you open.
Vision pass on the photos
Per-panel damage scored, frame and airbag signals flagged, photo gaps called out. The AI tells you what it can't see, not just what it can.
MOT and DVLA cross-check
DVSA MOT history and DVLA enquiry pulled by VRN. Mileage fraud surfaced when Copart's odometer disagrees with the last MOT.
Chat with the lot
"Is the frame bent?" "Why MAYBE not BUY?" Pinned to the lot detail page. Every answer cites the photo, listing field, or MOT advisory it drew from.
Built for the bid decision.
Not a marketplace, not a search tool, not a database. Six features focused on one thing: should you bid, and how high.
Damage detection
Per-panel scoring plus the eleven signals that decide a hit's repairable — airbag deployment, frame impact, flood lines, paint mismatch.
Repair plan
Line items with parts and labour, ADAS calibration warnings, complexity score, DIY-vs-shop split.
MOT and DVLA check
DVSA MOT history with mileage and advisories, DVLA make/model corroboration, mileage-fraud detection.
AI chat
Multi-turn chat pinned to every lot. Ask the AI to look closer at photo 7. Cited answers, no floaty replies.
Listing intelligence
Cat S/N/B/A decoded, Run-and-Drive translated, Additional Information notes parsed and prioritised.
Risk flags
Make and model defect surfacing, hidden-damage warnings, total-loss math sanity check.
Why CarMargin.
Built for Copart UK.
Cat S, Cat N, V5, MOT — assumed vocabulary, not jargon. UK fee curve, GBP, DVSA and DVLA integrations. No US Copart, no IAA, no Manheim.
Your data, in your browser.
CarMargin works inside your authenticated Copart session. Image bytes pass through to the AI in memory and are discarded. No image database. VRNs aren't linked to your account.
Every claim shows its source.
Damage calls cite the photo number. MOT flags cite the test year. Verdict explanations name the factors that drove BUY, MAYBE, or SKIP.
How it works.
Three steps. No upload, no copy-paste, no separate dashboard.
Install the extension
One click from the Chrome Web Store. Sign in. Done.
Browse Copart UK normally
List rows get BUY / MAYBE / SKIP badges. Lot detail pages get a sticky panel and a chat sidebar.
Bid with confidence
Max-bid number tuned to your target ROI, transport budget, and fee curve. Ask the chat to explain the verdict.
Read up before you bid.
Plain-English guides to the categories, fees, and certifications that decide whether a Copart UK lot is worth bidding on.
Cat S vs Cat N: write-off categories explained
What each category legally means, what it costs you in resale, and which ones are still worth bidding on. Plus where Cat A and Cat B fit in.
Copart UK buyer fees: what you actually pay
The fee curve is non-trivial and the listed sale price is rarely your real cost. The structure, the surprises, and how to back-solve a max bid from a target total.
How to spot mileage fraud before you bid
DVSA MOT history is a free public record. Used properly, it catches the most common form of fraud on the UK salvage market: clocked mileage.
What "Run and Drive" actually means
It's a certification, not a guarantee. Exactly what Copart tested, what they didn't, and why the badge is more limited than first-time buyers assume.
Preview day: a salvage inspection checklist
An hour at the yard, properly used, prevents most expensive surprises. What to bring, what to check, and the angles photos always miss.
Bidding next week?
CarMargin is in early access. Drop your email and we'll send the install link the moment the extension goes live.
Join the waitlistFree during early access. No card required.