What is a Porsche 928 GTS actually worth?

CarSearch.Pro's True Value model puts a typical Porsche 928 GTS at $22,300 as of September 2026, with a fair range of $19,600 to $24,900. Unlike a simple average of asking prices, True Value is anchored to 280 recent confirmed sales (median $28,300), normalized for mileage, and blends auction results with live market asks — sellers are currently asking a median of $25,000.

What does a Porsche 928 GTS cost?

As of September 2026, the median asking price for a Porsche 928 GTS is $25,000. The middle 50% of listings are priced between $16,000 and $44,900. Prices range from $6,035 (10th percentile) to $76,999 (90th percentile) across 296 active listings tracked by CarSearch.Pro.

Are Porsche 928 GTS prices going up or down?

In 2026-Q3, the median sale price was $29,880, up 24.5% from $24,000 in 2026-Q2. This is based on 85 sales recorded by CarSearch.Pro.

What is the best year Porsche 928 GTS to buy?

The 1980 Porsche 928 GTS offers the best value with a median price of $12,890 across 16 listings. This year has sufficient market inventory for competitive pricing.

Where are Porsche 928 GTS cheapest?

Based on current listings, NY has the lowest median price at $8,000 across 7 listings. The top states by inventory are CA (56), IL (23), FL (20), MI (14), AZ (14).

How long does it take to sell a Porsche 928 GTS?

Porsche 928 GTS listings spend an average of 139 days on market before selling or being removed. Sellers should expect longer listing periods in this market.

Will Porsche 928 GTS values go up or down over the next year?

CarSearch.Pro's 12-month model currently points UP for the Porsche 928 GTS (53% probability, volatile regime). For context, this model's past 12-month calls on this market have been directionally correct 54% of the time across 126 walk-forward tests. Forecasts are probabilistic, not guarantees.

How does mileage affect Porsche 928 GTS value?

Based on CarSearch.Pro's empirical mileage curve learned from actual Porsche 928 GTS sales, the relationship is non-linear: an example with around 424 miles trades at roughly 1.18x the reference value, while one with around 1,401,172 miles trades at roughly 0.73x. The reference point for this market is about 77,000 miles.

Porsche 928 GTS Price Guide & Market Report

Name: Porsche 928 GTS Market Data
Creator: CarSearch.Pro

Updated September 2026 | 296 active listings | 1,000 historical sales

Browse Listings

Median Price $25,000

Average Price $36,381

Fair Range (25th-75th) $16,000 - $44,900

Trend ↑ Up 24.5%

What a GTS Is Actually Worth

True Value $22,300

Fair Range $19,600 - $24,900

Median Recent Sold $28,300

Verdict WATCH

As of September 2026, CarSearch.Pro's True Value model estimates a typical Porsche 928 GTS is actually worth $22,300 (fair range $19,600 to $24,900). Unlike the median asking price shown above, True Value is anchored to 280 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 $25,000 — about 12% above what these cars have actually been selling for. That gap favors patient buyers: negotiate from the sold data, not the ask.

Well-supported value — but volatile.

See the full Porsche 928 GTS investment analysis →

Porsche 928 GTS Market Summary

As of September 2026, the Porsche 928 GTS market has 296 active listings across 14 marketplaces tracked by CarSearch.Pro. The median asking price is $25,000, with the middle 50% of listings priced between $16,000 and $44,900. GTS prices have increased 24.5% over the past quarter, from a median sale price of $24,000 to $29,880.

The typical GTS on the market has 85,748 miles. Listings spend an average of 139 days on market before selling or being removed.

Current GTS Pricing

A fair price for a Porsche 928 GTS in September 2026 is between $16,000 and $44,900 (25th to 75th percentile). Prices range from $6,035 to $76,999 across 296 active listings.

Price Distribution (296 Active Listings)
Percentile	Price	Meaning
10th	$6,035	Budget / project cars
25th	$16,000	Below average price
Median (50th)	$25,000	Typical market price
75th	$44,900	Above average / premium
90th	$76,999	Top tier / low miles / rare spec

The average asking price is $36,381, 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
10,000 - 25,000 mi	11	$52,500
25,000 - 50,000 mi	37	$45,500
50,000 - 100,000 mi	118	$26,950
100,000 - 150,000 mi	80	$22,499
Over 150,000 mi	18	$19,995

GTS Price Trends

Porsche 928 GTS prices have increased 24.5% over the past quarter. In 2026-Q3, the median sale price was $29,880 across 85 sales, up from $24,000 in 2026-Q2.

On a year-over-year basis, GTS prices are up 14.9% ($29,880 vs. $26,000 a year ago).

GTS Quarterly Sale Prices (Historical)
Quarter	Sales	Median Price	Average Price
2024-Q4	78	$25,500	$30,912
2025-Q1	65	$25,000	$36,455
2025-Q2	95	$30,500	$44,595
2025-Q3	109	$26,000	$34,705
2025-Q4	72	$30,250	$46,949
2026-Q1	91	$29,428	$33,789
2026-Q2	79	$24,000	$39,121
2026-Q3	85	$29,880	$43,411

Best Value GTS by Model Year

The 1980 GTS offers the best value with a median price of $12,890 across 16 listings. The most expensive model year is 1992 at a median of $155,000.

Median Price by Model Year
Year	Listings	Median Price	Min	Max
1978	6	$25,249	$3,928	$49,995
1979	19	$15,994	$3,000	$110,000
1980	16	$12,890	$4,800	$34,800
1981	19	$14,950	$3,000	$60,000
1982	15	$24,900	$3,500	$49,565
1983	28	$16,500	$2,500	$45,075
1984	16	$19,000	$2,500	$28,495
1985	22	$22,500	$3,500	$69,900
1986	27	$30,000	$5,000	$60,385
1987	24	$32,500	$16,000	$54,900
1988	34	$28,490	$9,928	$61,242
1989	16	$25,000	$3,200	$49,995
1990	8	$37,636	$27,000	$59,993
1991	9	$35,599	$34,928	$175,000
1992	1	$155,000	$155,000	$155,000
1993	8	$79,928	$45,000	$249,000
1994	21	$76,999	$47,500	$149,900
1995	6	$125,000	$79,928	$125,500

How Mileage Affects GTS 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 928 GTS from confirmed sales, referenced to a typical example at about 77,000 miles:

Odometer (approx.)	Value Multiplier	Implied Value
424 mi	1.18x	$26,255
4,859 mi	1.40x	$31,281
11,262 mi	1.53x	$34,107
21,253 mi	1.71x	$38,126
39,321 mi	1.20x	$26,839
65,216 mi	1.10x	$24,491
98,422 mi	0.87x	$19,331
141,530 mi	0.67x	$14,888
1,401,172 mi	0.73x	$16,211

Low-mileage examples carry a real premium in this market: around 424 miles, cars trade at roughly 1.18x the reference value. At the other end, 1,401,172-mile examples trade at about 0.73x. Implied values here are anchored to this market's True Value.

GTS Price Forecast

Horizon	Direction	Probability	Regime	Past Accuracy
6 months	↑ UP	52%	volatile	52% over 132 tests
12 months	↑ UP	53%	volatile	54% over 126 tests
24 months	↑ UP	55%	volatile	69% over 114 tests

These are probabilistic direction calls, not price targets. The "Past Accuracy" column is this model's real walk-forward record on the Porsche 928 GTS — 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 GTS

The highest concentration of Porsche 928 GTS listings is in CA with 56 active listings, followed by IL (23), FL (20), MI (14), AZ (14).

Regional pricing varies significantly. The lowest median price is in NY at $8,000, while VA has the highest at $77,998. Buyers willing to travel or arrange transport may find savings of $69,998.

Top States by Inventory
State	Listings	Median Price
CA	56	$24,890
IL	23	$20,800
FL	20	$22,798
MI	14	$22,995
AZ	14	$59,995
NC	12	$32,995
TX	10	$17,990
MA	9	$32,500
OH	9	$16,500
VA	9	$77,998

GTS Market Velocity

Porsche 928 GTS listings spend an average of 139 days on market. This is a slow-moving market. Listings tend to sit for extended periods, giving buyers significant negotiating power. Sellers should be realistic on pricing and patient.

The median time on market is 75 days. The lower median suggests most cars sell relatively quickly, while a smaller number of overpriced listings drag up the average.

GTS Buyer's Guide Summary

Fair price range: $16,000 to $44,900. The median is $25,000. Anything below $16,000 is a strong value; above $44,900 should be premium condition, low miles, or a desirable specification.
Trending up: GTS prices have risen 24.5% recently. Buying sooner may save money if the trend continues.
Best value year: The 1980 model year has the lowest median price at $12,890, making it the most accessible entry point into GTS ownership.
Negotiate: With an average of 139 days on market, sellers are often willing to negotiate. Listings over 60 days old are especially open to offers.

Ready to start shopping? Browse all 296 GTS listings with AI quality scores, or get a free AI appraisal on a specific listing.

Data sourced from 11 marketplaces including eBay Motors, Bring a Trailer, Cars & Bids, AutoTrader, CarGurus, Cars.com, Facebook Marketplace, Classic.com, and Hagerty Marketplace. Updated daily by CarSearch.Pro's automated pipeline. Browse all 296 active GTS listings. Read the latest GTS market analysis.