Depreciation Index

Callaway Quantum Max · 2026 — Drivers

All figures as observed on 6 November 2026. · n = 26

← Depreciation Index

Median asking price today

€372

n = 20

95% CI ±3.4%

Retained against the newest generation

—

Not computable at n = 20.

Reference age

months

Median days listed

n = 26

These listings have not sold, so this is a floor on days to sell, not days to sell.

6 observations excluded by interquartile rule before the median.

Depreciation curve — Drivers

Category cross-section: monthly discount rate −0.7% · R² 0.92 · n = 136 November 2026

Reference age, months since launch proxy

Median asking price by model year, all brands in the category, on one day. Each point carries its sample size. The fitted line is a constant monthly discount rate on the log of price. This is a correlation, not a causal estimate.

Model year	Age, months	Median price	n
2026	9	€385	449
2025	21	€308	1,982
2024	33	€306	1,111
2023	45	€252	803
2022	57	€236	847
2021	69	€300	347
2020	81	€204	413
2019	93	€205	256
2018	105	€180	243
2017	117	€182	154
2016	129	€153	213
2015	141	€137	106
2014	153	€143	206

Splits

By condition

Condition	Median price	n
Excellent	€385	13
Good	€360	11

By region

Region	Median price	n
UK	€385	26

Value retention inside Drivers

Brand	Retention, % of the newest median	n newest	n at 2–4 years
Callaway	85.6	608	641
Ping	77.1	141	92
TaylorMade	76.7	549	846
Cobra	75.6	524	227
Wilson	74.3	187	53
Cleveland	71.5	5	33
Titleist	69.7	107	601
Srixon	66.0	177	75
Mizuno	65.7	70	97
PXG	60.1	49	90

Base 100 on each brand's own newest generation in the category: median price at 2–4 years divided by median price of the current generation, on one day. A ratio, so brands in different price bands are comparable. This is a correlation, not a causal estimate.

Anomaly flags

Interquartile exclusion removed at least one observation.

The series

Daily collection on this Reference opened 26 August 2026. 37 observation days so far, 26 observations. A fitted curve for this Reference alone needs the series; until it exists we publish the category cross-section above and say so.

Permitted sources read for this Reference

GolfClubs4Cash — www.golfclubs4cash.co.uk (UK)

Reseller's own reference price, median £400, n = 3. This is the reseller's struck-through price, not a launch price.

Median asking price €372, n = 20, 95% CI ±3.4%, last observation 6 November 2026.

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