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Hull Gauge
Recomputed 5 Nov 2026, 03:30 UTC

Beneteau First 31.7vsJ/Boats J/105

Beneteau against J/Boats · used asking prices, listed in the UK, Europe and the US

At the same age, the J/Boats J/105 asks 46% more than the Beneteau First 31.7; on the headline Gauge Values it asks 14% more, which mixes ages: its boats are older (median build year 1998 against 2003). We can't yet say which holds its value better: the Beneteau First 31.7 has no published depreciation curve.

same age · 5 shared build years · 8 and 8 boats in them · Indicative · in today’s prices · asking, not sold

02

Year by year

Each build year's Gauge Estimate, for the 5 years both have boats in. Pooled across those years (8 and 8 boats), the J/Boats J/105 asks 46% more than the Beneteau First 31.7.

Beneteau First 31.7Year builtJ/Boats J/105
£35,500 (10)
2002—
—
£33,500 (8)
2001+37%
£46,000 (9)
—
2000—
£46,000 (10)
—
1999—
£45,500 (12)
Gauge Estimate by year built · comparable boats in brackets, built within three years either side · — below eight comparable boats; a year where neither has eight is left out · the gap is the right-hand model against the left
03

What your budget buys

£16k£43k£69k
Beneteau First 31.7
2006
newest build year whose Gauge Estimate is at or under £40,000 (£38,000, 8 comparable boats)
1
the one boat listed now asks £40,000 or less
J/Boats J/105
1998
newest build year whose Gauge Estimate is at or under £40,000 (£39,500, 10 comparable boats)
2
of the 2 boats listed now ask £40,000 or less

At £40,000 your money buys 8 years newer in the Beneteau First 31.7: a 2006 against a 1998.

04

A year of ownership

Each at its Gauge Value, on a South Coast marina berth, 44 engine hours a year (the median of 103 UK-listed sailing boats that report hours). An estimate in pounds from published rates, not a quote.

Beneteau First 31.7MeasureJ/Boats J/105
withheld
Depreciation (not in total)
£800
£5,000
Berth
£5,750
£2,800
Maintenance
£3,150
£450
Lift-out and antifoul
£500
£350
Insurance
£400
—
Fuel
£200
£8,600 (better)
Total a year, before depreciation and fuel
£9,800

Each line is the middle of the cited range, to the nearest fifty pounds. Depreciation is a year of age on each model's published curve, at its Gauge Value, and stays out of the totals.

The Beneteau First 31.7 has no published depreciation curve, so its depreciation is withheld.

Fuel is left out of both totals: for the Beneteau First 31.7, fewer than three of its listings give the engine power.

Sources: Lake Yard price list 2026 · BerthFinder · Boatsetter · Velos Insurance; Admiral Yacht Insurance · Boating Magazine, "Calculating Boat Fuel Consumption" · Littlehampton Marina fuel prices

05

Specification

Beneteau First 31.7MeasureJ/Boats J/105
Sail
Type
Sail
—
Length overall
10.52 m
—
Engine (as listed)
usually Yanmar 18 hpfrom listings
“from listings” marks figures read from the listings themselves; unmarked figures are from our model register and not yet checked against a builder’s published source.
06

Questions

Which is cheaper, the Beneteau First 31.7 or the J/Boats J/105?

At the same age the Beneteau First 31.7 is cheaper: the J/Boats J/105 asks 46% more than the Beneteau First 31.7 across 5 shared build years. Their Gauge Values, the median asking prices of all the boats we observed whatever their age, are £37,000 and £42,000.

Which holds its value better?

We can't say yet. The J/Boats J/105 loses about 1.9% of its asking price a year of age, but the Beneteau First 31.7 has no published depreciation curve: we fit one from at least 20 boats across six build years and publish it only when the fit holds. We have 14 Beneteau First 31.7 boats across 10 build years.

Which spends less time on the market?

Boats of the Beneteau First 31.7 had been listed a median of 412 days when we last saw them, against 235 days for the J/Boats J/105. That is time listed so far, not time to sell, which we don't measure yet. 25% of the Beneteau First 31.7 boats we saw 14 or more days apart cut their asking price, against 14% of the J/Boats J/105 boats.

How do you compare them like for like?

We compare boats of the same build year. For each of the 5 years both models have boats in, we take the ratio of their median asking prices in today's prices, then pool the years, giving more weight to years with more boats on both sides. The figure is Indicative because the thinner side has 8 boats in those years. The Gauge Values compare the whole fleets instead, so they mix boats of different ages.

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