What does a new Forest River RiverStone 421FK cost?
The Real Price of a new 2027 Forest River RiverStone 421FK is $166,900: the middle advertised price of 5 listings at 3 dealer chains, seen . That is 26% below the posted MSRP. These are advertised prices, not sale prices. How we work it out
See photos and floorplans on Forest River's website
6 for sale at 5 dealer locations · model years 2026–2027 · Fifth Wheel
Advertised from $151,900 to $167,492 (middle price $166,900). Lowest advertised: $151,900 at Bish's RV, Anderson IN.
Real Price
$166,900 for 2027 421FK: based on 5 new listings at 3 dealer chains, data as of .
We compared 5 listings. In 1, the price already includes shipping from the factory (Bish's RV). In 2, we used the dealer's total, which adds its fees. In 2, we used the advertised price with no fees added.
Real Price is the price in the middle of the listings we compared. It is not a sale price. A price drop means the advertised price went down. How we price →
Prices are the dealer's posted total where it shows one, otherwise the advertised price. They are not sale prices. The bars start at zero.
Show the numbers
| Compared price range | Number of new listings |
|---|---|
| $150,000 to $152,000 | 1 |
| $152,000 to $154,000 | 0 |
| $154,000 to $156,000 | 0 |
| $156,000 to $158,000 | 0 |
| $158,000 to $160,000 | 0 |
| $160,000 to $162,000 | 0 |
| $162,000 to $164,000 | 0 |
| $164,000 to $166,000 | 0 |
| $166,000 to $168,000 | 2 |
| $168,000 to $170,000 | 2 |
All 6 for sale, lowest price first
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2027Bish's RV — Anderson, IN · Stock #L1083826Below Real Price $15,000 below* Price drop $10,690 drop on Oct 30, 2026*$151,900 advertised
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2026Campers Inn RV — Tampa, FL · Stock #112240$160,293 advertised
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2027General RV Center — Phoenix, AZ · Stock #355235$166,900 advertised
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2027General RV Center — Phoenix, AZ · Stock #355237$166,900 advertised
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2027Campers Inn RV — Knoxville TN · Stock #115459Price drop $259 drop on Oct 23, 2026*$167,331 advertised
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2027Campers Inn RV — Ramsey, MN · Stock #117338Price drop $98 drop on Oct 23, 2026*$167,492 advertised
* We compare like with like: the dealer's posted total if it shows one, otherwise the advertised price. Taxes, title and registration are never included, so ask for the out-the-door price (the full amount you would pay). Real Price is the price in the middle of the listings we compared. It is not a sale price. A price drop means the advertised price went down.
Every floorplan and price history for the RiverStone → · ← All new Forest River fifth wheels
Prices shown are advertised prices. We compare like with like: the dealer's posted total if it shows one, otherwise the advertised price. Taxes, title and registration are never included, so ask for the out-the-door price (the full amount you would pay). We don't show or store dealer photos. The “See photos” button opens the dealer's own page for that RV.