🏎️
Built for Porsche buyers,
not dealerships.
FlatSixFinder scans every major marketplace in real time so you can find the best deal on a 911, Cayman, or Boxster — without spending hours doing it yourself.
Our Mission
Buying a used Porsche is exciting — but it's also one of the most research-heavy car purchases you can make. IMS bearings, Mezger vs M96 engines, 997.1 vs 997.2, DFI carbon buildup, model year quirks… the list goes on. Meanwhile listings are scattered across five different platforms, each with their own search interface.
FlatSixFinder brings it all together. We pull live listings from every major source, score them against real auction data, flag risks, and give you the tools to make a confident decision — all in one place, for free.
Where We Pull Listings From
Carvana
Certified used, nationwide shipping
Bring a Trailer
Live auctions, enthusiast market
Cars & Bids
Modern enthusiast auctions
PCarMarket
Porsche-only classifieds
Cars.com
Dealer & private listings
Features
🎯
Deal Score
Every listing is scored 0–100 based on price vs real sold auction comps, mileage, year, and engine risk. Higher = better deal.
🔔
Price Alerts
Set your model, year range, max price, and mileage. Get an email the moment a matching listing hits any of our sources.
🚩
Red Flag Detector
Instantly flags salvage titles, flood history, engine issues, liens, and other warning signs directly on the listing card.
🔍
Listing Analyzer
Paste any Porsche listing URL and get a full breakdown — price verdict, engine profile, inspection checklist, and questions to ask the seller.
📅
Seasonal Pricing
See which months historically show the lowest average Porsche prices — so you know the best time to buy.
📈
FlatSix Market Index
A single weekly number tracking overall Porsche market health — like the S&P 500 for flat-sixes. Embeddable on any site.
📚
Buyer's Guides
In-depth guides for the 996, 997, 991, Boxster, and Cayman covering IMS risk, Mezger engines, what to inspect, and fair prices.
🏷️
Model Insight Badges
Color-coded badges on every card for IMS risk, Mezger engine, DFI, and air-cooled — so you know what you're looking at instantly.
How Deal Scoring Works
Each listing is compared against a benchmark built from hundreds of real auction results on Bring a Trailer and Cars & Bids — filtered to the same model, year bracket, and trim. The score reflects how the asking price compares to what similar cars actually sold for, adjusted for the following factors:
Price vs CompsThe biggest factor. How far below or above real sold auction prices the listing sits.
MileageLower mileage = higher score, calibrated per model generation.
Engine RiskIMS-risk cars (996/997.1 Carrera) receive a score penalty unless the retrofit is confirmed.
Trim CalibrationGT3, GT4, Turbo, and base Carrera scores are benchmarked separately — apples to apples.
Ready to find your flat-six?
Live listings updated every few hours from 5 sources, with deal scores, red flags, and price history.
Browse Listings →