Four AI experts on every car you see.

Scan a VIN at a show, an auction or a dealer. DecodeThis decodes it, and Marcus, Jo, Evelyn and Gus tell you what matters, what to check and what to ask.

A buyer's advisor, a historian, an appraiser and a restorer
Coming soon to the App Store iPhone & iPad

VIN decoding powered by DecodeThis. Advice, not a certified inspection or appraisal.

How it works

From the plate on the dash to a decision

Built for standing at the car, with a phone in one hand and a catalog in the other.

  1. Scan it

    Point the camera at the VIN plate, a window sticker or the auction sheet. No signal? It's saved and sent when you're back online.

  2. Get the take

    DecodeThis decodes the VIN. Then an expert checks the claims, flags what to look at, and compares recent sales.

  3. Keep your garage

    Every car you saw, with your stars, price, mileage and notes, grouped by the show or auction you were at.

At the auctions

Cars our members shared from the floor

Grouped by the event they were seen at. Only cars our members chose to show on decodethis.net.

Barrett-Jackson Scottsdale 2026Oct 6, 2026–Jan 31, 2027 · Scottsdale, AZ5 carsAll eventsBarrett-JacksonSee the calendar →

The experts

Four points of view on every car

Each is an AI with its own focus. They cite what they used, say when something can't be verified, and never invent a production number or a price.

Marcus BellMarcus BellBuyer's advisor

Twenty-five years as a dealership service manager. Won't let you fall for a car before the paperwork checks out.

Jo WhitakerJo WhitakerEnthusiast / historian

Motoring journalist and marque historian. Knows why the car was built and who raced it.

Evelyn ParkEvelyn ParkCollector / appraiser

Concours judge and appraiser. Exacting about originality and correct parts, with a dry wit.

Gus KowalskiGus KowalskiRestorer / mechanic

Ran a restoration shop for 35 years. Knows what rusts, what breaks and which parts are scarce.