Porsche 911 GT3 (991)
Flagged undervalued because -35% vs 2-yr avg, -34% vs 3-yr trend, and sell-through 100%.
What It's Actually Worth
Blended value of a standard 7 yr, 8k mi example, ~$206K 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? 72% 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 39 scored forecasts: 72% got the direction right, median value error ±8%.
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 519 past auctions in this market — predicting each hammer price from market data before the sale (no hindsight). Typical miss: ±14%; the gavel landed inside our predicted range 9 in 10 of the time.
| Sold | Car | Our range | Hammer | |
|---|---|---|---|---|
| 2026-05-29 | 2019 · 1k mi | $153K–$369K | $274K | ✓ |
| 2026-05-28 | 2016 · 16k mi | $119K–$287K | $212K | ✓ |
| 2026-05-25 | 2019 · 19k mi | $117K–$282K | $266K | ✓ |
| 2026-05-21 | 2015 · 9k mi | $129K–$311K | $138K | ✓ |
| 2026-05-20 | 2016 · 0k mi | $156K–$375K | $285K | ✓ |
| 2026-05-16 | 2014 · 46k mi | $93.8K–$226K | $101K | ✓ |
| 2026-05-13 | 2015 · 13k mi | $122K–$293K | $127K | ✓ |
| 2026-05-10 | 2016 · 9k mi | $128K–$309K | $173K | ✓ |
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 | 2018 · 2k mi | classic | $137K–$438K ($245K) |
| open | 2019 · 6k mi | classic | $126K–$404K ($226K) |
| open | 2018 · 23k mi | classic | $99.8K–$320K ($179K) |
| open | 2016 · 0k mi | classic | $140K–$449K ($251K) |
| open | 2018 · 3k mi | classic | $135K–$434K ($242K) |
| open | 2018 · 4k mi | classic | $135K–$433K ($241K) |
| open | 2016 · 5k mi | classic | $133K–$428K ($239K) |
| open | 2018 · 6k mi | classic | $127K–$407K ($227K) |
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 | 54% | Low | 60% |
| 12 mo | UP | 59% | Low | 72% |
| 24 mo | UP | 64% | Low | 81% |
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 higher over the next ~12 months (low conviction — 23% of weighted drivers agree), driven mainly by Ethereum (USD) and Trade-Weighted Dollar Index, though Ethereum (USD) 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 2021
$100K invested 2021-04 → today (5.2 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.
Case-Shiller National Home Price leads by about 1 months (moves with this market, correlation 0.72). Shown shifted forward 1 months so its turns line up with the market's.
Why We Think This
Current Inventory Snapshot
Comparable Markets
| Market | Undervaluation | Appreciation | Liquidity |
|---|---|---|---|
| Porsche 911 GT2 RS (991) | 30 | 66 | 53 |
| Porsche 911 GTS (991) | 53 | 51 | 52 |
| Porsche 911 Turbo (991) | 50 | 50 | 50 |
Recent Signals & Alerts
- vin returned higher VIN relisted +$47,003 vs prior
- vin returned lower VIN relisted $-50,009 vs prior
- vin returned higher VIN relisted +$50,300 vs prior
- vin returned lower VIN relisted $-55,009 vs prior
- vin returned higher VIN relisted +$47,003 vs prior
- vin returned lower VIN relisted $-55,009 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.