Other tools give you a number. DriveIndex shows you the signal, the timing, the options, the forecast, and whether the car in front of you is actually a deal.
The Value Signal™ runs 3-window regression on mileage-normalized, seasonally-adjusted sale prices and classifies every car as Appreciating, Bottomed, Stable, or Depreciating — then tells you how sure it is.
Manual vs. auto, paint-to-sample, ceramics, a rare package — the Spec Premium engine mines thousands of comps and tells you the real dollar and percent each one adds, with the sample size behind it.
Prices for the same car swing with the seasons. DriveIndex measures each model's monthly pattern across years of sales and tells you the best months to buy and the months to avoid.
Bear, base, and bull projections at 1, 3, and 5 years, built on mean reversion and blended rate horizons. Confidence drops as the horizon grows, because the future is uncertain and we won't pretend otherwise.
Found a car for sale? Drop in the price and mileage. The listing analyzer returns a deal score, a mileage-adjusted fair value, downside risk, and the recent comps it's judged against.
Build your collection, then watch it the way you'd watch stocks. Every car's value updates daily, so you always know exactly how much each one — and your whole garage — is up or down.
5,000+ models, from a '73 Carrera RS to a 2024 Revuelto. If it trades, we track it.
Verified, completed auction prices — normalized for mileage and season. No estimates.
Buy / hold / sell with a confidence score, plus the best month and option premiums.
Score a listing, set a target, track your garage, and let Rad's picks find the next one.
The same team behind the data will help you buy your next car — pick the right one, spec it for resale, find it nationwide, and negotiate the price. Open to everyone. No account, no subscription — just book.
Deciding if now is the time, which year to buy, or whether a specific listing is right? We review the live market data with you and answer everything.
Book now →Ordering new? We spec the car together — the options that hold value, the colors that resell, and none of the add-ons that don't.
Book now →We find your exact spec nationwide — dealers, private sellers, auctions — then negotiate the price with the data to back it up.
Book now →No account needed · consultations fully refundable with 24-hour notice · Source & Negotiate backed by a satisfaction guarantee
The full toolkit — what's free, what's Pro, what's Collector.
One good call covers the year.
For getting started
Start freeFor active buyers & sellers
Upgrade to ProFor collectors & power users
Become a CollectorOnly completed auction sales drive valuations — never estimates or unverified asks.
Transmission, color, mileage and options are all priced in, like-for-like.
Every signal shows how sure it is. Thin data is capped, never dressed up.
Scraped at 5AM, signals recomputed by 7AM. Yesterday's sale is in today's data.
Every valuation is built from real, completed sales — 103,853 of them, aggregated daily from 13 auction houses and dealer marketplaces. We never use asking prices, dealer estimates, or unverified numbers.
Price guides give you a static range. DriveIndex gives you a mileage-adjusted fair value, a buy/hold/sell signal with a confidence score, the best month to buy, what each option is worth, and a deal score for any listing — recalculated every morning.
Yes — browse every model, see current market values, recent sales, and track your own cars in a personal garage, free forever. Pro and Collector unlock the Value Signal, projections, timing tools, and Rad's picks.
Anytime, in one click from your account — no calls, no forms. You keep access through the end of your billing period.
Collector members can request any car and we add it, with its sales history, within 7 days.
Explore the whole market free. Go Collector when you want the edge that pays for itself in one buy.
No credit card to start · cancel anytime · 103,853 sales and counting