Mercedes-Benz SL (R129)
1989–2001

Based on 41 verified auction results
£13,723
Market value · recent verified sales
+49.0%
12-month change
Hold or Wait
Appreciating but pace slowing. Patient buyers may find better entry.
Median sold price up 49.0% over the last 12 months. Hold if owned; chasing the trend at peak carries risk.
Price History
MSRP
—
Collectibility
3/10
Modest Demand
3-Year Forecast
£34,224
+149%
5-Year Forecast
£46,970
+242%
Market scores
50
Desirability
Moderate
55
Liquidity
Excellent
85
Resale Outlook
Spec Premium Engine
How spec moves the priceRight-hand drive
£11,121 median (n=11) vs £90,000,011,924 (n=4)
-100%
Built ≤ 1998
£15,250 median (n=27) vs £58,750,006,098 (n=14)
-100%
Computed from this model's verified auction sales. Premiums are the % difference between the median price of matching-spec lots vs the rest. Requires at least 3 sales on each side to be shown.
Marque analyst note
The Mercedes-Benz SL R129 has appreciated sharply in the UK market, climbing 49 percent year-on-year to a median of £13,723. The HOLD signal reflects solid upward momentum tempered by moderate confidence in the broader trend.
Only 14 sales have been tracked over the past twelve months from a total dataset of 41 transactions, suggesting moderate liquidity. This thin sample size means individual sales can skew results, though the consistency across 41 total observations provides reasonable grounding for trend assessment.
The R129 occupies the stable modern classic tier with production of over 213,000 units, positioning it as an accessible entry point rather than a scarcity play. Modest collectibility demand keeps valuations measured; appreciation is driven more by the model's age and usable character than rarity or investment fervor.
Cars tracked have averaged 28,510 miles, typical for UK-market examples of this generation that are now 25+ years old. Low mileage examples command premiums, though most transactions involve well-used, honest examples reflecting owner enjoyment rather than preservation.
The three-year projection sits at £34,224—a 149 percent gain from current levels—while the five-year base case reaches £46,970, implying a 242 percent move. Both figures suggest steady appreciation rather than explosive appreciation, consistent with the stable modern classic classification and gradual shift in collector interest toward the R129's design language and driving experience.
Depreciation Benchmark
- Current avg value£13,723
- Annual appr. rate+49.0%/yr
Best time to buy
Monthly price index vs. this model's averageBest deals on this model historically land in Apr (~77% below average). Avoid Jan, when competition drives prices higher.
Est. Annual Ownership Costs
- Insurance (agreed value)£450
- Maintenance£900
- Storage£2,400
- Depreciation— (appreciating)
- Total annual cost£3,750
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Market Liquidity
- Active Listings0
- Sales Last 12 Months13
- Sell-Through32%
Market Snapshot
- Active Listings0
- Avg Sale Price£23,013
- Avg Mileage at Sale28,510 mi
- Recent Price Range£3,600 – £340,000
- Total Sales Tracked41
Recent sales
Showing latest 20£31,250
Collecting Cars · 15 May 2026
£7,400
Collecting Cars · 9 Dec 2025
£8,240
the-market · 3 Dec 2025
£9,000
Collecting Cars · 20 Nov 2025
£6,890
the-market · 12 Nov 2025
£15,250
Collecting Cars · 24 Oct 2025
£25,000
Collecting Cars · 21 Oct 2025
£12,195
the-market · 21 Oct 2025
£16,100
Collecting Cars · 29 Sept 2025
£20,250
Collecting Cars · 1 Sept 2025
Indicative only — not investment advice. Past performance is not a reliable indicator of future value.