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718 Boxster8 MIN

Are Used Porsche Boxsters and Caymans Likely to Hold Their Value?

Recent 718 Caymans and Boxsters show strong estimated five-year value retention, yet those averages do not predict every used Porsche. Learn how generation, condition, mileage, specification and history change the resale outlook.

By CarCody Team

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Recent Porsche 718 Caymans and Boxsters appear likely to retain value relatively well for luxury two-seat sports cars, but the result depends heavily on the individual car. In iSeeCars’ 2026 ranking, the 718 Cayman retained an estimated 92.5% of its value after five years, compared with 83.1% for the 718 Boxster. Those are model-level estimates from one data set—not a promise that every car, generation or specification will achieve the same result.

What the strongest current data actually shows

The clearest like-for-like figures available are for the 718 generation, known internally as the 982. iSeeCars’ 2026 luxury two-seater depreciation ranking analyzed more than 3 million vehicles to estimate five-year depreciation. It placed the 718 Cayman second and the 718 Boxster third in that category.

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Model Estimated value retained after five years Average price of a five-year-old example How to read the figure
Porsche 718 Cayman 92.5% $106,503 iSeeCars model-level estimate for its 2026 luxury two-seater ranking
Porsche 718 Boxster 83.1% $97,885 iSeeCars model-level estimate for the same ranking and five-year window

The ranking’s percentages describe an estimated five-year retention rate, not the cash you will necessarily receive when selling. They also do not identify a particular engine, transmission, option package, mileage band, accident history or market. The average five-year-old prices are likewise averages within iSeeCars’ method, rather than guaranteed transaction prices for a specific car.

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iSeeCars says its broader rankings use data from more than 12 million cars, while the luxury two-seater calculation is described as analyzing more than 3 million vehicles. The distinction matters: a large sample improves the usefulness of a model-level estimate, but it cannot remove the differences between individual cars.

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Why a 718 Cayman and 718 Boxster can behave differently

In that 2026 ranking, the Cayman’s estimated retention is 9.4 percentage points higher than the Boxster’s. This is an observed difference in that data set. It does not establish that a Cayman will always outperform a Boxster, and the ranking does not explain the cause.

A buyer comparing the two body styles should therefore treat the result as a starting point, not a rule. The cars may differ in original equipment, specification, supply, mileage and the mix of examples entering the data. A well-kept Boxster with a desirable specification can be a stronger resale proposition than a neglected Cayman, while a high-mileage Cayman with an unattractive history can underperform the model average.

Generation matters more than the badge

“Boxster” and “Cayman” cover several generations with materially different engines and equipment. The available evidence does not provide a single, consistent time series covering every model year, so applying the 718 percentages to older cars would be misleading.

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981 generation: model years 2013–2016

Hagerty describes the 981 cars as model years 2013–2016. Its overview includes naturally aspirated flat-six variants and both manual and PDK transmissions. Those characteristics can make 981 examples appeal to a different group of buyers from later turbocharged cars, but the sources reviewed do not establish a 981 retention percentage that can be compared directly with the 718 figures.

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718/982 generation: introduced in 2016

Hagerty describes the 718 generation as introduced in 2016, with production through 2025 in its overview. It uses turbocharged engines and spans multiple trims. The iSeeCars estimates apply to 718 Cayman and 718 Boxster model groupings in its 2026 ranking; they should not be read as a result for every 718 engine, gearbox or trim.

Older generations

The evidence reviewed does not provide a unified, same-method comparison for 986, 987, 981 and 718 cars. Older examples may have different age-related maintenance needs, ownership patterns and enthusiast demand. A percentage calculated from recent 718 vehicles cannot forecast those cars’ future prices.

What determines the value of one used car

Hagerty’s individual valuation guidance identifies condition, mileage, options and history as value factors. Those variables should be treated as separate checks rather than folded into a single “average Porsche” assumption.

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  • Condition: Cosmetic wear, interior condition, mechanical health and evidence of repairs can move a car away from a guide’s representative condition.
  • Mileage: Two cars from the same model year can occupy different parts of the market when their odometer readings differ substantially.
  • Options and trim: Equipment and drivetrain choices affect which buyers consider the car and how they compare it with alternatives.
  • History: Service records, accident or title history, ownership documentation and evidence of proper maintenance affect confidence at resale.

These factors interact. A low-mileage car with incomplete records is not automatically a better buy than a higher-mileage example with a thorough, credible service history. Likewise, an expensive option does not guarantee that the next buyer will pay its original cost back. The practical objective is to identify how the actual car differs from the comparable vehicles used in a valuation.

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How to estimate the resale position of a specific Boxster or Cayman

Use a controlled comparison rather than mixing unrelated prices. The following process keeps the variables that matter visible.

  1. Identify the exact car. Record the model year, generation, body style, trim, engine description, transmission, mileage, geographic market and title status.
  2. Set one valuation date. Prices move over time, so do not combine an old guide figure with current asking prices without noting the dates.
  3. Choose a condition standard. Compare an excellent car with other excellent cars, or a driver-quality car with similar examples. Do not compare a guide’s top condition with an ordinary private-party listing.
  4. Match the body style and generation. Compare Boxster with Boxster or Cayman with Cayman first. If comparing the body styles, keep the generation, year, trim, transmission, mileage range and condition as similar as possible.
  5. List the meaningful equipment. Note transmission, engine variant, factory options and any changes that could affect buyer demand. Keep the list factual; do not assume an option will recover its original price.
  6. Verify history and records. Separate documented service and repairs from seller descriptions. Record accidents, title brands, number of owners and gaps in maintenance history.
  7. Use more than one pricing basis. Label each number as an asking price, completed auction sale, valuation-guide estimate or original MSRP. These are different measurements and should not be averaged together without a clear method.
  8. Check local comparables. A US-oriented national estimate may not describe pricing in another country or even another regional market. Use cars that are actually available to buyers in the same geography.
  9. Apply a realistic sale adjustment. The price a seller advertises is not necessarily the price a buyer pays. Account for time on market, inspection findings and the cost of correcting deferred maintenance when judging an offer.

Hagerty’s valuation pages are useful as a reference point, but Hagerty states: “The Hagerty Price Guide is for informational purposes only and is not intended as financial advice.” Treat any guide as a cross-check against current comparable cars and local conditions, not as an assurance of future value.

What the 2018 Boxster result tells you—and what it does not

A Hagerty search-result snapshot dated July 2026 showed a -23.4% three-year change for its listed condition estimate for a 2018 718 Boxster. This is a single model-year and page result, and it is not interchangeable with iSeeCars’ five-year cohort estimate. It should not be generalized to every 718 Boxster or Cayman.

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The number is nevertheless a useful warning against assuming that a strong model ranking means prices only rise. A car can retain a high share of its original value and still lose money over a shorter period. The outcome depends on the starting price, the measurement window and the specific condition standard. Always write down those three elements before interpreting a percentage change.

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Does strong retention mean these cars appreciate?

No. The available evidence supports relative retention for recent 718 models, not a forecast of appreciation. Retaining 92.5% or 83.1% of a reference value after five years still represents depreciation if the reference is the original price, and the percentages are estimates produced by iSeeCars’ methodology. Neither source establishes that all used Boxsters and Caymans will rise in value or avoid future declines.

Special specifications may behave differently from the model-level average, but the reviewed material does not provide enough transaction data to name a universally superior engine, gearbox, color or option combination. Any claim that one configuration is guaranteed to be an investment would go beyond the evidence.

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Buying decisions: when value retention should influence you

If you plan to keep the car for several years

Prioritize condition, documented maintenance and a specification you can live with. A lower purchase price is not a saving if deferred work, missing records or a damaged history makes the car harder to sell later. Value retention is one part of ownership cost, alongside insurance, servicing, taxes and financing.

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If you expect to sell soon

Short holding periods expose you to transaction costs and market movements that a five-year statistic cannot capture. Buy only after checking current comparables for the same generation and trim, and preserve every service invoice and inspection report. The next buyer will evaluate the individual car, not just the badge.

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If you are choosing between a Boxster and Cayman

Use the iSeeCars comparison as a data point: its 2026 estimate is higher for the 718 Cayman than the 718 Boxster. Then compare two actual cars on equal terms. A difference in mileage, accident history, transmission, options or condition can be more relevant to the sale price than the body-style average.

Geography, dates and data limits

The figures discussed here are US-oriented and do not establish resale behavior in other countries. Currency, taxes, registration rules, supply and buyer preferences can change the relationship between markets. Even within the United States, a national estimate may not match a particular region.

Valuation pages update over time. A number should always be accompanied by its source, valuation date, model year, condition definition and measurement window. Do not present the 2026 iSeeCars estimates as timeless facts, and do not turn the July 2026 Hagerty search-result snapshot into a general market trend.

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A practical checklist before buying or selling

  • Confirm generation, model year, trim, engine description and transmission.
  • Record mileage and compare it with cars in the same range.
  • Obtain a documented service and ownership history.
  • Check title, accident and repair records.
  • Describe condition consistently when reviewing guides and listings.
  • Separate asking prices, completed sales, guide estimates and original MSRP.
  • Use comparables from the same geography and valuation date.
  • Review factory options without assuming their original cost will be recovered.
  • Allow for inspection findings and deferred maintenance before setting an offer or asking price.
  • Recheck current valuation information immediately before making a transaction.

Bottom line

Recent 718 data supports the view that used Porsche Boxsters and Caymans can hold value well relative to other luxury two-seat cars. iSeeCars’ 2026 estimates—92.5% five-year retention for the 718 Cayman and 83.1% for the 718 Boxster—are encouraging, but they are not guarantees. The decisive question is not simply whether the car says Boxster or Cayman; it is whether that particular example has the right generation, condition, mileage, specification and history for its market. Older generations and special variants require separate evidence, and no available source justifies treating any of these cars as guaranteed appreciating assets.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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