Porsche 911 G-Series price trends (1977-1983)

The grade-2 values barely move: from €28,900-33,700 in October 2011 to €31,200-35,600 by mid-2014, a gain of roughly 3-8% in just under three years (Coupé from €28,900 to €31,200, Targa from €29,800 to €30,700, Cabriolet from €33,700 to €35,600).

The steepest rise in the whole series: from mid-2014 to mid-2016 the Classic Data tables lift the grade-2 values by roughly 41-51%, the Coupé from €31,200 to €47,000, the Targa from €30,700 to €46,200 and the Cabriolet from €35,600 to €50,200. This first high holds as a plateau into November 2017.

Between the November 2017 and February 2018 tables, Classic Data cuts its valuations by roughly 7% (Coupé at grade 2: from €47,000 to €43,700). By 2019 the values have fallen to €43,000-46,000, roughly 7-8.5% below the high of 2016/17; all three variants ease back to a similar degree.

Largely stable values with minimal movement: Coupé and Targa at €43,000-44,000, the Cabriolet at €46,000-47,000.

A rise of roughly 26-33% in several steps, the largest with the December 2021 tables (Coupé: from €44,000 to €54,300). By May 2023 the grade-2 values reach their high of €57,300-59,300 (Coupé €57,800, Targa €57,300, Cabriolet €59,300), the strongest push since the boom of 2014-2016.

The high holds as a plateau, almost unchanged, from May 2023 to January 2025. The correction then comes in two steps: roughly 2% with the April 2025 tables and a further 10% or so with the May 2026 tables, to €50,600-52,300, some 12% below the high in total. The June 2026 median sale prices (€63,500-76,316) sit above that: they reflect predominantly prepared dealer cars, whose prices typically fall between grade 2 and grade 1, and on the Cabriolet just above grade 1.

• The SC is the way into the classic 911 world: at medians of €55,000-65,856 the Coupé, Targa and US cells sit well below its successor, the Carrera 3.2 (Coupé median €79,800), and further still below the 2.7 and 3.0 Carrera models of the first G-Series years
• The one-year Cabriolet is the most expensive SC cell: a €76,316 median, roughly 16% above the Coupé. Classic Data also puts the Cabriolet consistently above the Coupé and Targa, though at grade 2 in May 2026 the gap is down to around €1,400
• Set against Classic Data: the medians fall between the May 2026 market values for grade 2 and grade 1 (Coupé: €65,856 against €50,900/€74,100; Targa: €63,500 against €50,600/€72,400); at €76,316 the Cabriolet just exceeds its grade-1 value of €75,900, a sign of prepared, ready-to-sell dealer cars
• US re-imports trade at a discount: Coupé €62,900 (around 4% below the European Coupé), Cabriolet €55,000 (around 28% below the European Cabriolet); on the Targa the two cells are almost level (€63,953 US against €63,500)
• SCs get driven: median mileages across every cell run between 118,900 and 155,759 km, and the low-mileage cars typical of collections are the exception
• Time on the market divides the field: the European Coupé and Targa sell in 32 and 34 days, the US Targa in 43 and the US Coupé in 71; the two Cabriolet cells take longest at 117 and 184 days, which points to ambitious pricing in the collector segment
• All 181 analysed sales are manuals with the 915 gearbox; the G50 question that affects prices on the Carrera 3.2 does not arise on the SC

• Judge the value realistically: Adjust your expectations to what the market is actually doing. In May 2026 the Classic Data market values sit roughly 12% below the high of 2023/24, and the trend has been downwards since 2025.
• Focus on preservation: Invest in preventive maintenance and conservation, to limit the loss of value from mechanical faults or corrosion.
• Build up the documentation: Gather every available record of the car’s history and document maintenance meticulously, because that raises the value against undocumented cars.
• Take the long view: Treat the SC primarily as a long-term holding or an enthusiast’s car, not as a short-term speculation.

• Room to negotiate: Use the updated market data as the basis for a realistic negotiation.
• Focus on quality rather than the variant: Because the price differences between variants are small, condition and history are worth more attention than the specific variant.
• A mechanical inspection: Invest in a thorough examination before you buy, because hidden faults can change the total cost considerably.
• Watch for originality: Favour unaltered, original cars over modified ones, because they perform better over the long term.

Still relevant, but with less influence than previously assumed.

As the cars age, maintenance and parts cost more, which can reduce the net return on a sale.

Growing electrification in the new-car market could support interest in classic combustion engines, though with a smaller effect on prices than previously assumed.

The general state of the economy and the path of inflation will have a decisive influence on prices for luxury goods such as classic cars.