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Used sedan, 2018
Live market data and proprietary AI-powered price forecasting for the 2018 BMW 3 Series 330i. Updated weekly from thousands of active listings.
Current median price
$14,995
312 active listings
60-day forecast
$15,171
AI-predicted median
Expected change
+1.2%
vs. today
Confidence
55%
forecast confidence
Median days on market
181 days
last 90 days, n=706 listings
How 2018 BMW 3 Series is tracking: CarCast forecasts a +1.2% 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.
We refresh the 2018 BMW 3 Series 330iforecast 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) |
|---|---|---|---|
| Nov 1, 2026 | $14,091 | $15,100 | $16,249 |
| Nov 8, 2026 | $13,951 | $15,099 | $16,384 |
| Nov 15, 2026 | $13,919 | $15,169 | $16,553 |
| Nov 22, 2026 | $13,833 | $15,156 | $16,611 |
| Nov 29, 2026 | $13,760 | $15,150 | $16,685 |
| Dec 6, 2026 | $13,657 | $15,137 | $16,713 |
| Dec 13, 2026 | $13,628 | $15,190 | $16,833 |
| Dec 20, 2026 | $13,507 | $15,171 | $16,924 |
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.