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Hull Gauge
Sheet 2676 · recomputed 5 Nov 2026, 03:30 UTC

3.9 m RIB by Williams Jet Tenders · built 2018–2027 (boats seen)

Williams Jet Tenders
Sportjet 395 used price guide

Gauge Value
Indicative · 8–24 boats
£41,500€48,500$55,000

Middle half published from ten boats

median asking price of 9 boats listed since May 2021, in today's prices · asking, not sold

Watch

3.90 mbeam 1.77 mfull specification

A used Williams Jet Tenders Sportjet 395 asks a median of £41,500€48,500$55,000 across 9 boats listed since May 2021, in today's prices.

01

The field

Each number is one boat: its asking price in thousands of pounds, at today's market level, set above the year it was built. Tap a number to see the boat behind it.

8 boats by year built · asking prices in £ thousands, in today's prices · listed since May 2021 · asking, not sold
8 boats is too few to draw a middle line. We draw one once 20 boats span six build years. 1 boat without a build year is not drawn.
02

Your boat

Estimated from the boats above. No email, no broker call.

Listed in
optional, in pounds
Gauge Estimate · Indicative
£41,500€49,000$52,000

Likely range £34,500€40,000$45,500 – £48,500€56,500$64,500

8 comparable boats built 2015–2027 · hours not given · all markets · window widened to ±6 years · asking, not sold

Add your asking price to see where it sits among boats like yours.

03

By year built

Median from five boats; middle half from ten. Below that we print nothing rather than a guess. Linked years have their own page with that year's boats. The spread is drawn on the field's scale, in pounds.

YearBoatsMedianMiddle halfSpread
20271—too few boats
2025–20260—none listed
20241—too few boats
20231—too few boats
20221—too few boats
20211—too few boats
20202—too few boats
20190—none listed
20181—too few boats

Too few boats to fit a depreciation rate yet. We fit one once 20 boats span six build years.

04

What moves the price

Each factor compares boats of the same age, so a newer boat's premium isn't counted twice. Five boats or more on each side, or we say so.

Age

Too few boats to fit an age rate yet.

—we fit one once 20 boats span six build years
Other factors

Too few boats to compare factors yet: we need five on each side of a split.

—engine hours, VAT, where it's listed, engines, fuel and hull, each age for age

Asking prices, not sold. Factors can overlap, so treat these as a guide to what the market asks, not a formula.

05

Time to sell

—

days listed so far · withheld: fewer than five boats seen on two or more dates

—

share that have cut their asking price · withheld: fewer than five boats seen at least 14 days apart

—

median size of a cut · withheld: fewer than five cuts to measure

These are asking prices, and asking is not selling. Days listed so far is not time to sell: a boat still listed has not sold, and we do not yet record when a listing ends. We have not measured how far sale prices land below asking; the methodology says what we can and cannot measure.

06

Cost to keep

A year on a South Coast marina berth, insured at the Gauge Value, in pounds. An estimate from published rates, not a quote.

Depreciation—not estimated: no published depreciation curve for this model
Berthing£4,500annual band for the region, Lake Yard marina berth, up to 8 m; Marina berth, South Coast · Lake Yard price list 2026 · BerthFinder
Maintenance and repairs£1,4502% to 5% of a value of £41,500 a year (maintenance, newer boats) · Boatsetter
Lift-out and antifoul£2003.9 m at the cited rate per metre (Lake Yard: lift, hold, pressure wash, relaunch, plus antifoul labour) · Lake Yard price list 2026
Insurance£4000.5% to 1.5% of a value of £41,500 a year · Velos Insurance; Admiral Yacht Insurance
Engine servicing—not estimated: labour rates are cited, but no source publishes the hours a service takes
A year of ownership, before depreciation£6,550 £550 a month

Fuel is not included: no cited source gives the engine hours a typical owner runs in a year.

08

Questions about the Sportjet 395

How much is a used Williams Jet Tenders Sportjet 395 worth?

The median asking price is £41,500, from 9 boats listed since May 2021, in today's prices. For a specific boat, use Your boat above.

How fast does a Williams Jet Tenders Sportjet 395 lose value?

Too few boats have been listed to fit a rate yet. We fit one once 20 boats span six build years.

Are these sold prices?

No. They are asking prices observed on public listings, restated at today's market level. We have not yet measured how far sale prices land below asking, so we do not publish a figure for it.

09

About the Sportjet 395

The boats behind this page were built between 2018 and 2027 and have been listed since May 2021, most often in the European market.

How we measure: we read public listings from brokers and marketplaces, count a boat once when it appears on several sites, store its asking price each time it changes, and restate older asking prices at today's market level. We never republish a listing, a photograph or a seller. Every figure is recomputed nightly and dated; below five boats we publish nothing. The 9 boats here were listed in the UK, Europe and the US. Full methodology

Length overall
3.90 mfrom listings · 6 boats
Beam
1.77 mfrom listings · 5 boats
Built
2018–2027from listings · 8 boats
Type
RIBour classification