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Used supercar, 1998
Live market data and proprietary AI-powered price forecasting for the 1998 Porsche 911 Turbo S. Updated weekly from thousands of active listings.
Current median price
$599,900
1 listings · avg 41k mi
60-day forecast
$596,806
AI-predicted median
Expected change
-0.5%
vs. today
Confidence
89%
forecast confidence
Median is anchored on listings averaging ~41k miles. Lower-mileage units typically trade $3,000–$5,000 above this median; higher-mileage units below it.
How 1998 Porsche 911 is tracking: CarCast forecasts a -0.5% 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 1998 Porsche 911 Turbo Sforecast 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 | $595,539 | $601,989 | $613,186 |
| Nov 1, 2026 | $593,404 | $601,212 | $614,874 |
| Nov 8, 2026 | $592,137 | $600,948 | $616,249 |
| Nov 15, 2026 | $590,908 | $600,143 | $616,707 |
| Nov 22, 2026 | $588,992 | $598,755 | $615,949 |
| Nov 29, 2026 | $588,542 | $598,462 | $616,896 |
| Dec 6, 2026 | $586,981 | $597,190 | $617,064 |
| Dec 13, 2026 | $586,094 | $596,806 | $618,088 |
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.
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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.