What a Porsche 718 Boxster/Cayman GT4 Is Actually Worth
True Value$155,100
Fair Range$136,500 - $173,700
Median Recent Sold$159,000
VerdictWATCH
As of August 2026, CarSearch.Pro's True Value model estimates a typical Porsche 718 Boxster/Cayman GT4 is actually worth $155,100 (fair range $136,500 to $173,700). Unlike the median asking price shown above, True Value is anchored to 105 recent confirmed sales, normalized for mileage, and blends auction hammer prices (grossed up for buyer's premium) with real-world asking behavior.
Sellers are currently asking a median of $159,900 — about 3% above what these cars have actually been selling for.
Well-supported value · momentum improving — but volatile.
As of August 2026, the Porsche 718 Boxster/Cayman GT4 market has 246 active listings across 14 marketplaces tracked by CarSearch.Pro. The median asking price is $159,900, with the middle 50% of listings priced between $124,900 and $206,993. Porsche 718 Boxster/Cayman GT4 prices have decreased 5.0% over the past quarter, from a median sale price of $199,999 to $189,995.
The typical Porsche 718 Boxster/Cayman GT4 on the market has 9,000 miles. Listings spend an average of 67 days on market before selling or being removed.
Current Porsche 718 Boxster/Cayman GT4 Pricing
A fair price for a Porsche 718 Boxster/Cayman GT4 in August 2026 is between $124,900 and $206,993 (25th to 75th percentile). Prices range from $111,850 to $220,297 across 246 active listings.
Price Distribution (246 Active Listings)
Percentile
Price
Meaning
10th
$111,850
Budget / project cars
25th
$124,900
Below average price
Median (50th)
$159,900
Typical market price
75th
$206,993
Above average / premium
90th
$220,297
Top tier / low miles / rare spec
The average asking price is $165,685, which is higher than the median, indicating that high-priced outliers (rare specifications, very low mileage, or concours-quality examples) pull the average up.
Price by Mileage
Mileage Range
Listings
Median Price
Under 10,000 mi
127
$204,998
10,000 - 25,000 mi
88
$127,995
25,000 - 50,000 mi
16
$119,990
50,000 - 100,000 mi
7
$86,195
Porsche 718 Boxster/Cayman GT4 Price Trends
Porsche 718 Boxster/Cayman GT4 prices have decreased 5.0% over the past quarter. In 2026-Q3, the median sale price was $189,995 across 62 sales, down from $199,999 in 2026-Q2.
On a year-over-year basis, Porsche 718 Boxster/Cayman GT4 prices are up 0.1% ($189,995 vs. $189,800 a year ago).
Porsche 718 Boxster/Cayman GT4 Quarterly Sale Prices (Historical)
Quarter
Sales
Median Price
Average Price
2024-Q4
43
$191,000
$170,719
2025-Q1
29
$180,000
$167,525
2025-Q2
67
$185,424
$174,261
2025-Q3
69
$189,800
$177,067
2025-Q4
80
$187,000
$173,856
2026-Q1
112
$172,000
$166,869
2026-Q2
203
$199,999
$191,033
2026-Q3
62
$189,995
$180,637
Best Value Porsche 718 Boxster/Cayman GT4 by Model Year
The 2016 Porsche 718 Boxster/Cayman GT4 offers the best value with a median price of $117,950 across 67 listings. The most expensive model year is 2025 at a median of $214,995.
Median Price by Model Year
Year
Listings
Median Price
Min
Max
2016
67
$117,950
$77,999
$209,995
2020
22
$134,985
$115,000
$154,990
2021
11
$131,900
$94,000
$169,981
2022
11
$145,000
$114,995
$189,000
2023
71
$195,000
$100,000
$249,990
2024
33
$209,998
$173,000
$279,000
2025
28
$214,995
$4,000
$269,900
How Mileage Affects Porsche 718 Boxster/Cayman GT4 Value
Most price guides assume value falls linearly with mileage. It doesn't. CarSearch.Pro learns the actual price-vs-mileage curve for the Porsche 718 Boxster/Cayman GT4 from confirmed sales, referenced to a typical example at about 3,714 miles:
Odometer (approx.)
Value Multiplier
Implied Value
557 mi
1.30x
$202,159
4,631 mi
1.00x
$155,067
10,430 mi
0.85x
$131,930
18,230 mi
0.84x
$130,692
38,148 mi
0.90x
$140,302
57,000 mi
0.81x
$126,309
97,980 mi
0.75x
$115,587
154,919 mi
0.65x
$100,961
300,000 mi
0.58x
$90,082
Low-mileage examples carry a real premium in this market: around 557 miles, cars trade at roughly 1.30x the reference value. At the other end, 300,000-mile examples trade at about 0.58x. Implied values here are anchored to this market's True Value.
Porsche 718 Boxster/Cayman GT4 Price Forecast
Horizon
Direction
Probability
Regime
Past Accuracy
6 months
↑ UP
53%
volatile
55% over 42 tests
12 months
↑ UP
56%
volatile
61% over 36 tests
24 months
↑ UP
61%
volatile
67% over 24 tests
These are probabilistic direction calls, not price targets. The "Past Accuracy" column is this model's real walk-forward record on the Porsche 718 Boxster/Cayman GT4 — every month we re-run the forecast as if we only knew what was knowable then, and grade it against what actually happened. We publish the hit rate either way. Full methodology & track record →
Where to Buy a Porsche 718 Boxster/Cayman GT4
The highest concentration of Porsche 718 Boxster/Cayman GT4 listings is in CA with 13 active listings, followed by TX (13), FL (12), GA (10), MI (6).
Regional pricing varies significantly. The lowest median price is in CO at $99,000, while FL has the highest at $195,000. Buyers willing to travel or arrange transport may find savings of $96,000.
Top States by Inventory
State
Listings
Median Price
CA
13
$115,000
TX
13
$124,995
FL
12
$195,000
GA
10
$134,999
MI
6
$122,999
NY
6
$127,995
WA
5
$111,850
AZ
5
$192,991
PA
4
$133,900
OR
4
$124,900
Porsche 718 Boxster/Cayman GT4 Market Velocity
Porsche 718 Boxster/Cayman GT4 listings spend an average of 67 days on market. This is a slower market. Buyers have negotiating leverage, especially on listings that have been active for 60+ days. Sellers should consider competitive pricing from the start.
The median time on market is 46 days. The lower median suggests most cars sell relatively quickly, while a smaller number of overpriced listings drag up the average.
Fair price range: $124,900 to $206,993. The median is $159,900. Anything below $124,900 is a strong value; above $206,993 should be premium condition, low miles, or a desirable specification.
Trending down: Porsche 718 Boxster/Cayman GT4 prices have dropped 5.0% recently. Patient buyers may benefit from waiting, but desirable examples still sell quickly.
Best value year: The 2016 model year has the lowest median price at $117,950, making it the most accessible entry point into Porsche 718 Boxster/Cayman GT4 ownership.
Negotiate: With an average of 67 days on market, sellers are often willing to negotiate. Listings over 60 days old are especially open to offers.