As of August 2026, CarSearch.Pro's True Value model estimates a typical Triumph Bonneville T120 is actually worth $7,400 (fair range $6,100 to $8,400). Unlike the median asking price shown above, True Value is anchored to 16 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 $11,500 — about 55% above what these cars have actually been selling for. That gap favors patient buyers: negotiate from the sold data, not the ask.
As of August 2026, the Triumph Bonneville T120 market has 4 active listings across 14 marketplaces tracked by CarSearch.Pro. The median asking price is $11,995, with the middle 50% of listings priced between $10,995 and $15,000. Triumph Bonneville T120 prices have decreased 40.6% over the past quarter, from a median sale price of $13,500 to $8,016.
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 August 2026 is between $10,995 and $15,000 (25th to 75th percentile). Prices range from $2,995 to $15,000 across 4 active listings.
Price Distribution (4 Active Listings)
Percentile
Price
Meaning
10th
$2,995
Budget / project cars
25th
$10,995
Below average price
Median (50th)
$11,995
Typical market price
75th
$15,000
Above average / premium
90th
$15,000
Top tier / low miles / rare spec
The average asking price is $10,246, 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 40.6% over the past quarter. In 2026-Q3, the median sale price was $8,016 across 1 sales, down from $13,500 in 2026-Q2.
On a year-over-year basis, Triumph Bonneville T120 prices are down 46.6% ($8,016 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
1
$8,016
$8,016
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 1969 at a median of $15,000.
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
1969
1
$15,000
$15,000
$15,000
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 4,345 miles:
Odometer (approx.)
Value Multiplier
Implied Value
232 mi
1.06x
$7,866
6,426 mi
1.19x
$8,829
10,607 mi
1.05x
$7,755
18,814 mi
0.74x
$5,511
45,832 mi
0.85x
$6,268
63,246 mi
0.97x
$7,169
97,980 mi
0.95x
$7,034
154,919 mi
0.78x
$5,742
300,000 mi
0.74x
$5,500
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
↓ DOWN
51%
volatile
67% over 39 tests
12 months
↑ UP
49%
volatile
61% over 33 tests
24 months
↑ UP
49%
volatile
48% over 21 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: $10,995 to $15,000. The median is $11,995. Anything below $10,995 is a strong value; above $15,000 should be premium condition, low miles, or a desirable specification.
Trending down: Triumph Bonneville T120 prices have dropped 40.6% 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.