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Used supercar, 2021
Live market data and proprietary AI-powered price forecasting for the 2021 Porsche 911 GT3. Updated weekly from thousands of active listings.
Current median price
$23,500
2 listings · avg 12k mi
60-day forecast
$23,459
AI-predicted median
Expected change
-0.2%
vs. today
Confidence
59%
forecast confidence
Median is anchored on listings averaging ~12k miles. Lower-mileage units typically trade $3,000–$5,000 above this median; higher-mileage units below it.
How 2021 Porsche 911 is tracking: CarCast forecasts a -0.2% move over the next 60 days. The broader used-car market is down 0.6% year-over-year (MUVVI) and down 1.5% on the consumer price index.
Median asking prices aggregated weekly from active dealer and auction listings.
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We refresh the 2021 Porsche 911 GT3forecast every Sunday. We'll email you a short update whenever the median moves more than $500 or 2%.
| Week ending | Low (P10) | Expected (P50) | High (P90) |
|---|---|---|---|
| Oct 25, 2026 | $22,674 | $23,389 | $24,450 |
| Nov 1, 2026 | $22,423 | $23,494 | $24,882 |
| Nov 8, 2026 | $22,046 | $23,537 | $25,261 |
| Nov 15, 2026 | $21,637 | $23,592 | $25,489 |
| Nov 22, 2026 | $21,432 | $23,512 | $25,611 |
| Nov 29, 2026 | $20,978 | $23,464 | $25,976 |
| Dec 6, 2026 | $20,892 | $23,461 | $26,096 |
| Dec 13, 2026 | $20,885 | $23,459 | $26,346 |
Our model expects prices to stay roughly flat over the forecast window.
CarCast's AI-powered forecasting combines live listing prices, historical trends, regional economic indicators, and search-interest data to project where used car prices are heading. Informational analytics only — not financial advice.
Forecasts and trend classifications are informational analytics only and do not constitute financial advice or a recommendation to purchase, hold, or sell any vehicle. Individual market conditions vary.
Get price alerts, weekly market updates, and full access to 60-day forecasts for every vehicle CarCast tracks.
Segment median, alongside your existing valuation tools. The next step is a market-risk review of five vehicles — not a separate checkout.
The forecast on this page is the public 30-day median. Dealer is $199/mo for a full lot. A 90-day forecast is not published.