A STIHL RB 400 pressure washer typically costs about $200-$450 used, while older new or dealer-held stock may be priced around $450-$700. Condition, included accessories, local availability, and whether the machine runs reliably are the biggest price drivers.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Used RB 400 | $150 | $325 | $450 | Working unit, condition and accessories vary |
| New old stock | $450 | $575 | $700 | Availability is limited; confirm warranty |
| Basic repair | $75 | $175 | $350 | Diagnosis and common service parts |
| Replacement washer | $350 | $600 | $900 | Comparable gas models, depending on specs |
What a Working STIHL RB 400 Usually Sells For
For a running used machine with a sound pump, functional engine, and no major leaks, a typical private-sale price is $250-$400. Units with worn hoses, a missing spray gun, hard starting, or uncertain maintenance often sell for $150-$250. A clean machine with useful nozzles and documented service may reach $400-$450.
New old stock is uncommon because the RB 400 is an older model, so advertised prices can reflect scarcity rather than current replacement value. Buyers should compare the quote with a current pressure washer offering similar pressure, flow, warranty, and parts support. Assumptions: U.S. private-party pricing, ordinary wear, and a complete machine without delivery. Condition and a working pump matter more than the original purchase price.
How the RB 400 Price Breaks Down
A used-unit price is mainly the machine itself; a repair-shop purchase may also include inspection, service, and a limited dealer warranty. These are approximate quote components, not charges every seller adds.
| Cost component | Typical range | What it covers | Price effect |
|---|---|---|---|
| Base used machine | $150-$450 | Engine, pump, frame | Largest portion of a private-sale price |
| Labor and inspection | $50-$150 | Testing, setup, basic checks | May be included in dealer pricing |
| Hose and spray accessories | $25-$100 | Replacement hose, gun, or tips | Depends on missing or worn parts |
| Common repair parts | $15-$120 | Filters, seals, carburetor parts | Varies with diagnosis and availability |
| Pickup or delivery | $0-$75 | Local transport | Often negotiable in private sales |
Repair labor at small-engine shops commonly runs about $75-$125 per hour, sometimes with a separate diagnostic charge of $30-$75. Ask whether the seller or shop has tested the machine under pressure, not just started the engine.
Which RB 400 Condition Details Change the Quote?
A pump that builds steady pressure without pulsing or leaking supports the upper used-price range. A machine that starts but has weak output may need pump service, unloader adjustment, or new seals; repairs can quickly exceed $150. Engine smoke, fuel leaks, or a damaged pump can push the value below $150 or make the unit suitable only for parts.
Included equipment also changes value. A complete high-pressure hose, trigger gun, and usable spray tips can add practical value compared with a bare unit, while cracked hoses or missing fittings may require $25-$100 in replacements. For any advertised pressure or flow figure, verify the specific machine’s label and manual rather than relying on a listing. Unverified performance claims should not justify a premium.
When Does a Repair Beat Buying Another Washer?
A $75-$150 repair can make sense when the RB 400 starts reliably, the pump is healthy, and the problem is limited to a hose, filter, or small engine service. A $200-$350 repair is harder to justify on a machine worth around $250-$400 unless the diagnosis confirms that the pump and engine are both in good shape.
Get a written estimate before approving major pump or engine work. Compare the repair total with a replacement gas washer that includes a new warranty and locally available parts. A lower-priced replacement may have different pressure and water-flow ratings, so compare both specifications and intended cleaning tasks. Set a repair limit before authorizing disassembly or parts replacement.
Dealer Stock and Private Sales Carry Different Price Risks
Private sellers often price a used RB 400 lower, around $150-$400, but typically provide no return period or warranty. A dealer’s inspected used unit may cost more, particularly if service or a short warranty is included. New old stock at $450-$700 should be checked carefully for storage condition, return terms, and warranty coverage; age can affect hoses, seals, and fuel-system components even when the machine looks unused.
Prices can also vary by location. In areas with fewer STIHL dealers or scarce used equipment, asking prices may run roughly 10%-20% higher than comparable listings in a market with more supply. Shipping a heavy pressure washer can erase that difference, so local pickup is often the better comparison. Compare total out-of-pocket price, not just the listed amount.
What Three RB 400 Quotes Might Include
A $200 private-sale quote could cover a running washer with ordinary cosmetic wear and no accessories beyond the basic gun and hose. A $350 quote might be for a cleaner, tested unit with working accessories and a recent service receipt. A $600 dealer quote could represent new old stock or a thoroughly inspected machine, but its value depends on warranty and return terms.
These examples are price scenarios, not fixed market rates. Before paying, ask to see a cold start, confirm stable operation while spraying, inspect for leaks, and check that the hose and fittings match the machine. A brief operating test can prevent an expensive parts-only purchase.
How to Keep an RB 400 Purchase Within Budget
Compare at least three local listings and separate the machine’s value from the cost of missing accessories or needed service. If the seller cannot demonstrate pressure, price the unit as untested and leave room for diagnosis. Avoid paying extra for add-ons that are worn, incompatible, or unnecessary for the buyer’s work.
For a repair, request the diagnosis and parts estimate before work begins, and ask whether a less expensive service can address the problem safely. For dealer stock, confirm the warranty in writing and compare the price with a current model of similar capability. The strongest budget protection is a documented test and a firm maximum purchase price.