Auto-margin Documentation

Last updated: May 5, 2026

General

Is my car good?

A decision framework for evaluating an individual vehicle.

Decision framework

A strong deal clears all four criteria. A workable deal clears three. Two or fewer indicates the deal requires further investigation or should be passed.

  • Margin: sufficient spread remains after fees, transport, reconditioning, and operational costs.
  • Confidence: enough comparable listings support the price band to make the read reliable.
  • Velocity: the segment is currently active in the target market.
  • Risk: no significant red flags in spec, mileage, history, or market volatility.

Red flags

  • Asking price missing or inconsistent with described condition
  • Few comparable listings (thin segment)
  • Outlier specification (rare trim, unusual options)
  • Wide market band (low confidence)
  • Asking price at or above market midpoint before added costs

Green flags

  • Stable comparable listings across multiple sources
  • Clear gap in local supply
  • Dealer-fit evidence available
  • Asking price below the lower edge of the market band

Known limitations

Auto-margin's comparison engine is reliable across most evaluations, but some results may still be imprecise.

  1. Model-year ambiguity. Facelifts or new generations with the same name and power output can pull in listings from the wrong generation.
  2. Source listing errors. Human-entered mistakes in source platforms can pass through if they are not detectable during ingestion.

If a result appears incorrect, use the Copy infobutton and include the copied vehicle information, the processing date, and a short description of what appears wrong.

Scope of the recommendation

Auto-margin evaluates whether a vehicle represents a good deal at the point of purchase: market price band, margin, comparable listings, and risk indicators in the target market.

It does not currently predict how an individual vehicle will perform on a specific dealer's lot. The final purchase decision rests with the user.