An enthusiast-driven look at the online auction market for Porsche GT and specialty cars.
Sorted by fastest appreciating first. Select a model to drill down charts below.
| Model | 2 Year Count |
Avg value today | Direction |
|---|
| Sale date▾ | Source▾ | Year▾ | Gen▾ | Model▾ | Color▾ | Miles▾ | MSRP▾ | Outcome▾ | High bid▾ | w/Fee▾ | % of MSRP▾ |
|---|
Flat Six Figures started after I bought my first Porsche GT4. What began as a simple Google Sheet—tracking GT4 values, figuring out what to pay, when to buy, and generally justifying the “guy math” behind buying a Porsche—quickly became something much bigger.
I kept adding more data, charts, and analysis, then expanded into 911 variants. Before long, the project had outgrown Google Sheets entirely. So I taught myself how to build a website with Claude, automated as much of the process as possible, and turned that original spreadsheet into what you see today.
There is still plenty of daily, hands-on data entry behind the scenes, so I genuinely appreciate any support. Flat Six Figures is fueled by coffee, gasoline, and an unhealthy amount of Porsche auction data.
About the data Currently covering: 981 GT4 and Spyder; 718 GT4, GT4 RS, Spyder and Spyder RS; 991 GT3, GT3 Touring, GT3 RS, GT2 RS, 911 R and Speedster; 992 GT3, GT3 Touring, GT3 RS, S/T, GT3 S/C, Dakar and Sport Classic. All US listings, both sold and reserve-not-met, from Bring a Trailer, Cars & Bids and PCARMARKET. Major outliers and non-US-market cars are excluded. Values are the price paid including buyer’s fee, as a percentage of the car’s original MSRP; unsold cars count at their high bid. Trend lines are least-squares fits, and anything past today is an estimate, not a forecast. Flat Six Figures is not affiliated with or endorsed by Dr. Ing. h.c. F. Porsche AG, Bring a Trailer, Cars & Bids or PCARMARKET; all marks belong to their respective owners.
© 2026 Nick George · Flat Six Figures