Farmhouse sink, loft
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2026 Forest River Sandpiper 3990FL
NewStock #2610948
Listing price
2026 Sandpiper 3990FL
Other floor plans with a similar body style, feature mix, and price range, prioritizing other manufacturers and brands.
Length
43 ft 6 in
Dry weight
12,510 lbs
Sleeps
6
Slideouts
5
The 3990FL is built around a front living room that actually feels like one. Panoramic windows, a fireplace, and a 50" smart TV anchor the space, while the kitchen earns its keep with a farmhouse sink, solid surface countertops, a gas cooktop, and a proper island. A full loft with dedicated stairs adds real sleeping space without the awkwardness of a ladder, and the rear King bed comes with a walk-in shower and enough slide-out real estate to make the bedroom feel residential. Practical touches like an automatic leveling system, 200W roof solar, washer/dryer prep, and dual ducted air conditioners show this rig is set up for extended stays. Not just weekends.
Many factors play into a unit's listing price and what you should pay. This guide provides a ballpark estimate, but it does not factor in your exact scenario or how different listings are equipped.
There may be room for price negotiation.
Unlock pricing insights with RV Envy Pro →$63,995 – $78,999
This unit has been on the lot for 61 to 90 days.
When was this unit listed?This unit ranks near the lowest priced for new units in this model year.
From the dealer's listing
Shop the 2026 Forest River Sandpiper 3990FL - Stock #2610948. It is currently available at Camping World in Boyertown, PA.
Camping World
Boyertown, PA
Sells faster than 0% of US RV dealers
Compared with 1,320 dealers nationwide
Other listings for this floor plan, ranked by condition, model year, distance, price, and listing quality.
The listing price on this unit has changed 2 times.
