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Forest River Berkshire 390QS

Class Abuilt 2008–12Mixed build tierFindable on the used market
WHAT ONE COSTS
$100,400est. used (2012, 14 yr old)

Sticker was $220,975 in 2011. Out of production since 2012, so the used market is the only way to buy one. Estimate assumes a 2012 unit.

THE SPECS
Length39.8 ft
Height (incl. A/C)12.4 ft
Width8.3 ft
Interior height7.0 ft
GVWR28,000 lb
Dry weightnot published
Sleeps5
Slide-outs4
Fresh water86 gal
Grey water60 gal
Black water44 gal
Air conditioning13,500 BTU
Fuel100 gal
Generator8 kW Onan diesel generator

A missing row means the maker never published that figure: unknown, not zero.

WHERE PEOPLE SLEEP
  • 1× Rear queen bed in slide(Permanent)—
  • 1× Sofa bed(Convertible)—
  • 1× Dinette(Convertible)—
HOW IT'S BUILT: 4/5
WallsAzdel composite
FrameSteel
RoofStandard
UnderbellyEnclosed

Forest River (Mixed tier): Forest River

YEAR BY YEAR: WHAT CHANGED
  • 2008Introduced with the Berkshire line
  • 2012Final model year
FINDING ONE

Findable: a few listed nationwide most weeks. Why: Forest River is a volume manufacturer; 14 years out of production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

First-generation 40-footer with a rear queen slide - the volume Berkshire of the 2008-2012 era.

OTHER BERKSHIRE FLOORPLANS
34B · 32,400 lb · sleeps 534QS · 32,400 lb · sleeps 7360FWS · 28,000 lb · sleeps 4360QS · 28,000 lb · sleeps 538A · 33,350 lb · sleeps 5390BH · 27,910 lb · sleeps 6390RB · 27,910 lb · sleeps 539A · 33,400 lb · sleeps 539B · 33,400 lb · sleeps 7400BH · 29,500 lb · sleeps 540F · 37,320 lb · sleeps 7XL 37A · 38,320 lb · sleeps 4XL 37B · 38,320 lb · sleeps 6XL 40A · 33,000 lb · sleeps 4the whole line →
Find one for sale

Live listings for the 390QS on the big marketplaces. Each search opens pre-filled with this exact floorplan:

RV Trader ↗Camping World ↗FB Marketplace ↗Google ↗

Inventory varies by site and day. Slim pickings? search the whole Berkshire line ↗

Is the 390QS your #1, or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about. Set your priorities as sliders, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.

See where it ranks for you →

Data compiled from dealer and aggregator listings, retrieved 2026-07.