Porsche 911SC
The Porsche 911SC market shows a high confidence of 0.935 for continued volatility across 6, 12, and 24-month horizons, with a slight upward trend probability ranging from 0.51 to 0.54. The market currently registers an overvaluation score of 54.86, which is the highest among reported metrics, and Advance Retail Sales, with a 0.7 correlation and 4-month lead, stands out as the strongest leading indicator.
What It's Actually Worth
Blended value of a standard 44 yr, 95k mi example, ~$62.5K now. The green line weighs confirmed auction sales most heavily (the amber dots — what cars actually hammered for), blends in fast-selling "just-missed" listings, and lightly smooths out month-to-month composition noise.
Did our model work? 56% direction calls right
Each faint amber line is a forecast we would have made at that point in the past (12-mo horizon), drawn against what actually happened (blue). Over 89 scored forecasts: 56% got the direction right, median value error ±26%.
Walk-forward: each ghost uses only data available at that date — no hindsight. Data-backed market intelligence, not a guaranteed prediction. Figures are modeled estimates from asking prices, sold comps, and public economic indicators; they can be wrong. Not financial advice.
Auction Scorecard gavel in range 9 in 10
We replayed 261 past auctions in this market — predicting each hammer price from market data before the sale (no hindsight). Typical miss: ±20%; the gavel landed inside our predicted range 9 in 10 of the time.
| Sold | Car | Our range | Hammer | |
|---|---|---|---|---|
| 2026-09-06 | 1978 · 110k mi | $31.9K–$117K | $46.5K | ✓ |
| 2026-09-05 | 1982 · 62k mi | $34.0K–$125K | $85.0K | ✓ |
| 2026-09-04 | 1983 · 6k mi | $43.7K–$160K | $65.0K | ✓ |
| 2026-09-02 | 1983 · 190k mi | $27.4K–$101K | $95.0K | ✓ |
| 2026-08-27 | 1978 · 29k mi | $40.4K–$148K | $70.5K | ✓ |
| 2026-08-27 | 1980 · 18k mi | $39.9K–$146K | $50.5K | ✓ |
| 2026-08-25 | 1982 · 120k mi | $30.9K–$113K | $36.3K | ✓ |
| 2026-08-24 | 1980 · 58k mi | $34.9K–$128K | $88.5K | ✓ |
Live now — calling it before the gavel
We're currently tracking 8 open auctions in this market. Here's our predicted hammer range for each — check back after they close.
| Closes | Car | Source | Our predicted range |
|---|---|---|---|
| open | 1983 · 112k mi | ebay | $26.7K–$145K ($62.2K) |
| open | 1978 · 88k mi | classic | $27.4K–$147K ($63.6K) |
| open | 1980 · 57k mi | classic | $28.6K–$154K ($66.3K) |
| open | 1978 · 63k mi | classic | $27.8K–$149K ($64.4K) |
| open | 1982 · 85k mi | classic | $27.4K–$147K ($63.4K) |
| open | 1980 · 97k mi | classic | $27.2K–$146K ($63.1K) |
| open | 1979 · 103k mi | classic | $27.1K–$146K ($62.9K) |
| open | 1978 · 189k mi | classic | $23.1K–$124K ($53.5K) |
No-lookahead: predictions are made before each auction closes; the scorecard grades confirmed sold auctions only (no-sales excluded). A modeled estimate, not a guarantee. Data-backed market intelligence, not a guaranteed prediction. Figures are modeled estimates from asking prices, sold comps, and public economic indicators; they can be wrong. Not financial advice.
Where We Think It's Headed
Probability and range, not a single number. Wider = less certain (not bigger gains).
| Horizon | Direction | Probability | Confidence | Past accuracy |
|---|---|---|---|---|
| 6 mo | DOWN | 48% | Low | 73% |
| 12 mo | UP | 54% | Low | 56% |
| 24 mo | UP | 56% | Low | 57% |
Data-backed market intelligence, not a guaranteed prediction. Figures are modeled estimates from asking prices, sold comps, and public economic indicators; they can be wrong. Not financial advice.
If You’d Bought in 2012
$100K invested 2012-10 → today (13.9 yrs), this car vs where else you could've put the money. Rebased to 100 at the start; the dashed line is inflation (break-even).
What This Market Follows
Specialty-car prices don't move in a vacuum. These economic indicators have historically led this market — tap one to see it shifted forward by its lead time, overlaid on the value line.
Advance Retail Sales leads by about 4 months (moves with this market, correlation 0.70). Shown shifted forward 4 months so its turns line up with the market's.
Why We Think This
Current Inventory Snapshot
Comparable Markets
| Market | Undervaluation | Appreciation | Liquidity |
|---|---|---|---|
| Alfa Romeo 105 Sedan | 84 | 22 | 32 |
| Mercedes-Benz 190SL | 51 | 40 | 56 |
| BMW 2002 tii | 60 | 33 | 13 |
| Datsun 240Z | 49 | 56 | 44 |
| Datsun 280Z | 48 | 45 | 59 |
| Ferrari 308 | 38 | 55 | 45 |
| Ferrari 308 GT4 | 54 | 47 | 15 |
| Ferrari 328 | 44 | 53 | 51 |
Recent Signals & Alerts
- vin returned higher VIN relisted +$16,495 vs prior
- vin returned higher VIN relisted +$10,000 vs prior
- vin returned higher VIN relisted +$16,495 vs prior
- vin returned higher VIN relisted +$16,495 vs prior
- inventory shortage Inventory dropped (robust z=-3.6)
- price jump Median asking moved sharply (z=6.7)
Data-backed market intelligence, not a guaranteed prediction. Figures are modeled estimates from asking prices, sold comps, and public economic indicators; they can be wrong. Not financial advice.