Know what cars are truly worth.

If you want to buy a classic Ferrari or a clean air-cooled Porsche, you are negotiating against people who do this every day. Dealers know what the last three sold for. Auction specialists know which configurations command premiums and which don’t. You, as a private buyer, are working from asking prices, gut feel, and whatever you can find on a forum.

AutoIndex exists to close that gap. We track advertised and achieved prices across the collector car market — by make, model, generation, and configuration — and surface that data in a way that’s genuinely useful when you’re standing in front of a car with a chequebook.

AutoIndex currently tracks over 1,000 collector car models across every major segment — supercars, grand tourers, classics, sports cars, performance saloons, and SUVs. Pricing is modelled from segment benchmarks, published auction results, and advertised market data, and updated regularly.

We are transparent about what the data is during this stage: it is a market model, not a live transaction feed. Every price you see on AutoIndex is labelled as indicative, and we never obscure that distinction. As our dataset grows — through auction integrations, dealer partnerships, and private sale records — the model will increasingly give way to verified transaction data.

The direction is toward the kind of granularity that lets you look up what a specific configuration — say, a Guards Red 993 RS in Clubsport specification — has genuinely achieved at auction over the last 36 months. We’re not there yet. We’re building toward it.

AutoIndex is free to use as a research tool. You can explore the full catalogue, track segment performance, browse auction results, and compare models without creating an account. A free profile unlocks a personal watchlist, price history on every model, and portfolio tracking so you can log the cars you own and monitor their value over time.

For those who want to go deeper, AutoIndex Editions are long-form collector references written from the perspective of the market. Not appreciations — working documents that cover production data, ownership economics, configuration premiums, and the investment case for every model line in dossier depth. Ten volumes are available for pre-order now, covering Ferrari, Porsche, Jaguar, BMW, Lamborghini, Aston Martin, and Alfa Romeo.

We’re a small team and we read every email. If you have a question about the data, a correction to suggest, or you’re interested in a data partnership or dealer integration, write to us at hello@auto-index.co.

We also post market insights, auction highlights, and guide previews on Instagram — @autoindexapp.