Porsche 911SC
The Porsche 911SC market indicates a slight upward trajectory over the next 6, 12, and 24 months, with probabilities ranging from 0.51 to 0.54, though a volatile regime is expected. Appreciation momentum stands at 53.19 and overvaluation at 54.72, while Real Disposable Income per Capita, leading by 11 months with a correlation of 0.65, is the strongest leading indicator.
What It's Actually Worth
Blended value of a standard 44 yr, 98k mi example, ~$65.0K 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 88 scored forecasts: 56% got the direction right, median value error ±27%.
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 238 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, and we lean slightly high on average.
| Sold | Car | Our range | Hammer | |
|---|---|---|---|---|
| 2026-07-16 | 1981 · 115k mi | $32.5K–$119K | $49.0K | ✓ |
| 2026-07-15 | 1981 · 95k mi | $34.1K–$124K | $70.0K | ✓ |
| 2026-07-14 | 1978 · 67k mi | $34.3K–$125K | $112K | ✓ |
| 2026-07-10 | 1979 · 150k mi | $29.3K–$107K | $55.0K | ✓ |
| 2026-07-09 | 1978 · 89k mi | $34.1K–$125K | $66.0K | ✓ |
| 2026-07-08 | 1981 · 166k mi | $28.8K–$105K | $67.5K | ✓ |
| 2026-07-01 | 1981 · 60k mi | $35.1K–$128K | $46.5K | ✓ |
| 2026-06-29 | 1983 · 65k mi | $34.4K–$126K | $70.0K | ✓ |
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 · 156k mi | ebay | $23.8K–$128K ($55.2K) |
| open | 1983 · 3k mi | classic | $41.0K–$220K ($95.1K) |
| 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) |
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 | UP | 51% | Low | 69% |
| 12 mo | UP | 52% | Low | 56% |
| 24 mo | UP | 54% | Low | 54% |
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.
Crystal Ball — What Leading Indicators Signal
Distinct from the trend forecast above: this blends all 8 leading indicators (each at its own lead time, de-duplicated so correlated ones don't double-count) into one signal. Leading indicators are collectively signaling lower over the next ~12 months (low conviction — 22% of weighted drivers agree), driven mainly by Personal Savings Rate and PCE Price Index, though PCE Price Index points the other way.
Are the indicators agreeing?
Each bar is one driver's current push; longer = more weight. All one side = high conviction; split = low.
If You’d Bought in 2012
$100K invested 2012-10 → today (13.8 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.
LVMH (luxury proxy ADR) leads by about 11 months (moves with this market, correlation 0.61). Shown shifted forward 11 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 | 66 | 43 | 36 |
| Mercedes-Benz 190SL | 41 | 45 | 54 |
| BMW 2002 tii | 47 | 56 | 20 |
| Datsun 240Z | 50 | 48 | 28 |
| Datsun 280Z | 38 | 64 | 52 |
| Ferrari 308 | 36 | 50 | 52 |
| Ferrari 308 GT4 | 54 | 47 | 16 |
| Ferrari 328 | 55 | 40 | 53 |
Recent Signals & Alerts
- vin returned higher VIN relisted +$10,000 vs prior
- vin returned lower VIN relisted $-50,000 vs prior
- vin returned higher VIN relisted +$10,000 vs prior
- vin returned lower VIN relisted $-50,000 vs prior
- vin returned higher VIN relisted +$18,000 vs prior
- vin returned lower VIN relisted $-50,000 vs prior
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.