Porsche 356 Speedster (Replica)
The Porsche 356 Speedster (Replica) market exhibits low appreciation momentum (36.96) and liquidity (33.64), alongside a depreciation risk score of 70.68. Near-term signals indicate a 0.51 probability of a down trend within 6 months, shifting to a 0.5 probability of an upward trend for the 12-month and 24-month horizons, all within a volatile regime. U. Michigan Consumer Sentiment, with a correlation of -0.61 at a 23-month lead, is a strong leading indicator for this market.
What It's Actually Worth
Blended value of a standard 68 yr, 11k mi example, ~$119K 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? 64% 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 59 scored forecasts: 64% got the direction right, median value error ±64%.
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 6 in 10
We replayed 220 past auctions in this market — predicting each hammer price from market data before the sale (no hindsight). Typical miss: ±43%; the gavel landed inside our predicted range 6 in 10 of the time.
| Sold | Car | Our range | Hammer | |
|---|---|---|---|---|
| 2026-09-19 | 1958 · 84k mi | $80.5K–$295K | $208K | ✓ |
| 2026-09-19 | 1959 · 23k mi | $57.7K–$212K | $100K | ✓ |
| 2026-09-17 | 1960 · 0k mi | $110K–$403K | $136K | ✓ |
| 2026-09-15 | 1960 · 8k mi | $66.4K–$244K | $196K | ✓ |
| 2026-09-05 | 1959 · 32k mi | $49.3K–$265K | $125K | ✓ |
| 2026-09-05 | 1959 · 33k mi | $65.9K–$242K | $125K | ✓ |
| 2026-09-04 | 1955 · 15k mi | $57.8K–$212K | $251K | ✗ |
| 2026-08-15 | 1952 · 43k mi | $70.0K–$257K | $2205K | ✗ |
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 | 1955 · 17k mi | hemmings | $47.2K–$256K ($110K) |
| open | 1960 · 25k mi | ebay | $49.9K–$270K ($116K) |
| open | 1956 | ebay | $56.5K–$305K ($131K) |
| open | 1956 · 100k mi | ebay | $55.6K–$299K ($129K) |
| open | 1956 · 1k mi | classic | $75.7K–$407K ($176K) |
| open | 1958 · 48k mi | classic | $62.2K–$334K ($144K) |
| open | 1958 | classic | $52.3K–$281K ($121K) |
| open | 1955 · 15k mi | classic | $33.6K–$181K ($77.9K) |
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 | DOWN | 51% | Low | 71% |
| 12 mo | DOWN | 51% | Low | 64% |
| 24 mo | DOWN | 51% | Low | 47% |
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.
Lead Indicator Forecast
Some indicators move before this market does. VIX Volatility Index has historically led it by about 23 months — so its recent move implies where prices head next (dashed). The solid green line is actual value through today; the shaded path is what the lead implies.
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 higher over the next ~12 months (moderate conviction — 51% of weighted drivers agree), driven mainly by VIX Volatility Index and U. Michigan Consumer Sentiment, though U. Michigan Consumer Sentiment 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 2007
$100K invested 2007-11 → today (18.8 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.
High-Yield Bond Spread leads by about 17 months (moves with this market, correlation 0.46). Shown shifted forward 17 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
- price jump Median asking moved sharply (z=-4.1)
- price jump Median asking moved sharply (z=7.7)
- vin returned higher VIN relisted +$70,000 vs prior
- vin returned higher VIN relisted +$70,000 vs prior
- vin returned higher VIN relisted +$70,000 vs prior
- vin returned higher VIN relisted +$70,000 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.