Farmhouse sink, loft
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2026 Forest River Sandpiper 3990FL
NewStock #46228
Listing price
2026 Sandpiper 3990FL
Other floor plans with a similar body style, feature mix, and price range, prioritizing other manufacturers and brands.
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.
Length
43 ft 6 in
Dry weight
12,439 lbs
GVWR
15,375 lbs
Sleeps
9
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.
$63,495 – $78,999
This unit is ranked 6 of 12 by asking price in this group.
The listing price on this unit has changed 2 times.
See the complete price timeline and the rest of this unit's pricing insights.
TerryTown RV Superstore
Grand Rapids, MI
Compared with 24 dealers in Michigan
Forest River Sandpiper 3990FL stands out with a GVWR of 15375 pounds and a length of 43.5 feet. Built with a robust chassis and premium interior finishes, it features a hitch weight of 2825 pounds and a dry weight of 12439 pounds. A generous capacity with Total Black Water Tank Capacity of 50 gallons and Total Gray Water Tank Capacity of 80 gallons ensures ready-to-go convenience, and hit the open road with confidence. View the Forest River Sandpiper at TerryTown RV.
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