The engine is rule-based on curated model data and published quarters. It does not crawl or average live listings daily.
That design keeps editions stable for compliance and audit: everyone references the same table for a quarter.
Market listings can spike or dip with seasonality and one-off adverts. The guide smooths through structured depreciation instead.
When your customer cites Facebook prices, explain you are using an edition-dated benchmark, not today's cheapest ad.
Why the guide does not copy Autotrader prices
How this product differs from averaging classified ads.