As of October 2026, CarSearch.Pro's True Value model estimates a typical Triumph Bonneville T120 is actually worth $7,700 (fair range $3,200 to $11,600). Unlike the median asking price shown above, True Value is anchored to 17 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 $11,000 — about 43% above what these cars have actually been selling for. That gap favors patient buyers: negotiate from the sold data, not the ask.
As of October 2026, the Triumph Bonneville T120 market has 3 active listings across 14 marketplaces tracked by CarSearch.Pro. The median asking price is $10,995, with the middle 50% of listings priced between $2,995 and $11,995. Triumph Bonneville T120 prices have decreased 51.1% over the past quarter, from a median sale price of $13,500 to $6,600.
The typical Triumph Bonneville T120 on the market has 4,306 miles.
Current Triumph Bonneville T120 Pricing
A fair price for a Triumph Bonneville T120 in October 2026 is between $2,995 and $11,995 (25th to 75th percentile). Prices range from $2,995 to $11,995 across 3 active listings.
Price Distribution (3 Active Listings)
Percentile
Price
Meaning
10th
$2,995
Budget / project cars
25th
$2,995
Below average price
Median (50th)
$10,995
Typical market price
75th
$11,995
Above average / premium
90th
$11,995
Top tier / low miles / rare spec
The average asking price is $8,662, which is lower than the median, suggesting pricing is relatively symmetrical across the market.
Triumph Bonneville T120 Price Trends
Triumph Bonneville T120 prices have decreased 51.1% over the past quarter. In 2026-Q3, the median sale price was $6,600 across 5 sales, down from $13,500 in 2026-Q2.
On a year-over-year basis, Triumph Bonneville T120 prices are down 56.0% ($6,600 vs. $15,000 a year ago).
Triumph Bonneville T120 Quarterly Sale Prices (Historical)
Quarter
Sales
Median Price
Average Price
2024-Q3
1
$13,900
$13,900
2025-Q1
1
$8,800
$8,800
2025-Q2
2
$12,250
$9,213
2025-Q3
2
$15,000
$14,000
2025-Q4
5
$6,191
$6,754
2026-Q1
6
$12,000
$11,979
2026-Q2
4
$13,500
$10,902
2026-Q3
5
$6,600
$8,343
Best Value Triumph Bonneville T120 by Model Year
The 1963 Triumph Bonneville T120 offers the best value with a median price of $10,995 across 1 listings. The most expensive model year is 1966 at a median of $11,995.
Median Price by Model Year
Year
Listings
Median Price
Min
Max
1963
1
$10,995
$10,995
$10,995
1966
2
$11,995
$2,995
$11,995
How Mileage Affects Triumph Bonneville T120 Value
Most price guides assume value falls linearly with mileage. It doesn't. CarSearch.Pro learns the actual price-vs-mileage curve for the Triumph Bonneville T120 from confirmed sales, referenced to a typical example at about 6,426 miles:
Odometer (approx.)
Value Multiplier
Implied Value
232 mi
1.01x
$7,807
6,426 mi
1.20x
$9,241
14,000 mi
0.92x
$7,103
18,814 mi
0.72x
$5,559
45,832 mi
0.83x
$6,429
63,246 mi
0.98x
$7,565
97,980 mi
0.92x
$7,088
154,919 mi
0.76x
$5,839
300,000 mi
0.77x
$5,940
Mileage sensitivity in this market is comparatively mild — condition and specification matter more than the odometer alone. Implied values are anchored to this market's True Value.
Triumph Bonneville T120 Price Forecast
Horizon
Direction
Probability
Regime
Past Accuracy
6 months
↑ UP
49%
volatile
68% over 37 tests
12 months
→ FLAT
50%
volatile
68% over 31 tests
24 months
→ FLAT
50%
volatile
63% over 19 tests
These are probabilistic direction calls, not price targets. The "Past Accuracy" column is this model's real walk-forward record on the Triumph Bonneville T120 — 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 →
Triumph Bonneville T120 Buyer's Guide Summary
Fair price range: $2,995 to $11,995. The median is $10,995. Anything below $2,995 is a strong value; above $11,995 should be premium condition, low miles, or a desirable specification.
Trending down: Triumph Bonneville T120 prices have dropped 51.1% recently. Patient buyers may benefit from waiting, but desirable examples still sell quickly.
Best value year: The 1963 model year has the lowest median price at $10,995, making it the most accessible entry point into Triumph Bonneville T120 ownership.