A Stihl FS 120 price is usually about $100-$250 for a working used trimmer, while a professionally serviced unit may cost $200-$350. The model is discontinued, so condition, included cutting attachments, local availability, and repair needs matter more than a standard retail price.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Used, running FS 120 | $100 | $175 | $250 | Price depends on starting, idle, and cutting performance |
| Serviced or refurbished FS 120 | $200 | $275 | $350 | Ask what parts and service are included |
| New-old-stock unit | $350 | $450 | $600 | Uncommon; verify condition and seller support |
| Common repair allowance | $25 | $90 | $250 | Minor tune-up through larger engine or drive repair |
What a Stihl FS 120 costs in today’s used market
For a complete FS 120 that starts readily, holds an idle, and runs its cutting head without unusual vibration, a practical buying range is $125-$225. A clean example with a straight shaft, intact guards, good compression, and usable harness can reach $250-$300, especially where demand for gas-powered brushcutters is strong.
Units sold as-is or with a known problem commonly list around $50-$125. That lower price can be reasonable if the fault is limited to a fuel line, primer bulb, or worn trimmer head. A unit that has low compression, a damaged shaft, or an uncertain ignition problem may cost more to repair than its purchase price suggests.
A realistic target for a tested, ordinary-condition FS 120 is about $175, before tax or any needed repair. Prices assume a used machine sold in the United States, with no unusual attachments or professional warranty.
Assumptions: Complete used trimmer, standard cutting head, normal local pickup, and no major engine or shaft damage.
What the FS 120 quote includes beyond the powerhead
A seller’s price may cover only the power unit, or it may include the cutting head, blade, harness, guard, and service. Each missing or worn item affects the value. The following ranges are approximate replacement or service costs, not guaranteed dealer quotes; parts availability can vary because the FS 120 is an older model.
| Cost item | Typical range | What changes the amount | Buyer check |
|---|---|---|---|
| Used trimmer powerhead and shaft | $75-$200 | Compression, shaft condition, and running behavior | Test from cold and inspect for cracks |
| Trimmer head or blade | $15-$65 | Head type, blade compatibility, and wear | Confirm attachment fits the machine |
| Harness and guard | $20-$90 | Missing parts and replacement availability | Check safety guard and mounting points |
| Basic tune-up labor and parts | $60-$150 | Cleaning, filters, plug, fuel lines, and shop rate | Request an itemized estimate |
| Carburetor or ignition repair | $90-$250 | Parts needed and diagnostic time | Compare repair price with replacement options |
Shop labor is often billed around $75-$125 per hour, with diagnostic or minimum service charges of roughly $25-$60. A straightforward tune-up may take less than an hour, but an old machine with seized fasteners or several faults can require more time.
Missing safety equipment can turn an apparently cheap listing into a poor-value purchase. Before paying, confirm that the shaft, throttle controls, stop switch, guard, and attachment hardware are present and serviceable.
How compression and shaft length change the FS 120 price
Engine condition is the largest price variable. A seller should demonstrate a cold start, stable idle, clean acceleration, and continued operation when warm. Hard starting, fuel leakage, smoke, or a head that keeps spinning at idle can signal maintenance needs or a more serious fault. A compression reading around 120 psi or higher is generally encouraging for a used two-stroke, but a mechanic should interpret the test using the correct procedure and model specifications.
Check the drive shaft and gearbox as well as the engine. Excessive vibration, rattling, a bent shaft, or grinding from the gear head can mean repair costs of $75-$200 or more. A machine with a sound engine but a failing drive assembly should not be priced like a fully operational example.
Attachment and configuration also matter. A standard trimmer head is more useful for routine grass work than an unfamiliar or worn blade setup. If the cutting head is missing, budget about $15-$65 for a compatible replacement, plus any adapter or installation charge. A complete harness and guard can add value, but only if they fit and are in safe condition.
One clear fault can justify a discount; multiple untested systems warrant a substantially lower offer. For example, an FS 120 priced at $175 with a worn head and fuel-line leak may need another $40-$120, while compression or shaft problems can push the total well beyond $300.
How FS 120 prices differ by region and selling channel
Local supply affects asking prices. In areas with large lots, landscaping work, and many small-engine shops, functional brushcutters may attract more buyers. Listings in these markets can run roughly 10%-20% above a comparable rural or lower-demand market. In places where battery equipment is common or used gas tools are plentiful, sellers may accept 10%-15% less.
Private-party listings typically offer the lowest purchase prices, but usually provide no warranty and may allow only a brief test. A small-engine dealer or repair shop may charge 15%-35% more than a private seller for a tested or serviced unit. That premium can include inspection, cleaning, or limited support, so buyers should ask exactly what is covered rather than assume a warranty is included.
Online shipping can erase a low asking price. A long-shaft power tool may incur roughly $40-$100 in packing and shipping, depending on distance and carrier rules. Local pickup is often the better value, since it allows a cold-start test and avoids shipping damage or a costly return.
Compare the total delivered and repair-ready cost, not just the listing price. A $130 local machine that needs $80 of work can be less attractive than a $220 shop-tested unit with documented service.
What common FS 120 repairs add to the purchase budget
Minor service usually includes a new spark plug, air-filter cleaning or replacement, fresh fuel, and inspection of the fuel system. Parts may total $10-$45 for a basic owner-performed tune-up. A shop visit for similar work often brings the bill to $60-$150 after labor and minimum charges.
Fuel-system work can cost about $25-$100 in parts and labor when the issue is a primer bulb, hose, or filter. Carburetor cleaning or replacement can raise the estimate to roughly $75-$175, depending on parts and shop rates. If the engine has poor compression or damaged internal components, repairs can exceed $200 and may not be economical for a low-priced used unit.
Ask a repair shop to inspect the exact machine before authorizing a large repair. Older equipment may have parts that are unavailable, obsolete, or sold only through limited suppliers. A shop should distinguish a confirmed defect from a speculative repair recommendation and provide an estimate that includes labor, parts, and diagnostic charges.
Set a repair ceiling before buying, such as $75 for routine work or $150 for any uncertain mechanical issue. If the projected total approaches the cost of a newer, supported trimmer, compare alternatives before proceeding.
FS 120 versus newer FS 131 and lighter trimmers
The FS 120 is an older professional-style gas trimmer, so its used price can look attractive next to a new commercial model. A used FS 120 at $150-$250 may suit a buyer who can test and maintain two-stroke equipment. The trade-off is age: parts condition, service history, and seller support may be uncertain.
A newer Stihl FS 131 generally costs several hundred dollars more when purchased new, with exact pricing varying by dealer and configuration. It can provide current dealer support and a new-machine warranty, but the higher purchase price is difficult to justify for occasional light trimming. Buyers should compare dealer quotes and warranty terms rather than treat the FS 120 as a direct equivalent in condition.
For small lawns and routine edging, a lighter residential trimmer or battery model may cost less to operate and be easier to handle. A used residential gas trimmer may sell for about $50-$150, while a new battery kit with battery and charger often falls around $150-$400. Those options may not match the FS 120’s durability or cutting capacity for heavy brush.
The FS 120 makes financial sense when its tested condition and repair budget keep the total below a comparable supported machine. For frequent commercial use, a shop-backed unit or newer model may justify a higher initial price.
Three realistic FS 120 purchase budgets
These examples show how condition and service alter the final cost. Local tax is excluded because rates differ by location. Attachment needs and shop labor can also change the totals.
| Example | Purchase and work | Estimated total | Price context |
|---|---|---|---|
| As-is project | $75 trimmer + $90 fuel-system repair + $25 head | $190 | Worth considering only if engine and shaft test well |
| Private-party runner | $175 trimmer + $30 replacement line and filter | $205 | Typical budget for a usable, tested machine |
| Shop-serviced unit | $275 trimmer + $45 new cutting head | $320 | Higher price may include inspection or limited service support |
For the as-is example, a confirmed carburetor fault could keep the repair within budget, but a compression problem would likely make the total uneconomical. In the private-party example, the buyer should still verify warm running and check for leaks after the machine has operated. For the shop-serviced example, the buyer should request an invoice showing the work completed and ask whether any service guarantee applies.
Use the estimated all-in total to compare listings with different conditions and included equipment. A seller’s description alone is not proof that a machine has been serviced or tested.
How to lower the FS 120 price without buying hidden repairs
Compare at least three local listings with similar condition, attachments, and test results. A listing with a higher asking price may be the better value if it includes a sound harness, guard, and cutting head. Conversely, accessories do not compensate for low compression or an unsafe shaft.
Test the machine before negotiating. Ask the seller not to warm it beforehand, then check a cold start, idle, throttle response, stop switch, and operation under load. Inspect the air filter, fuel lines, tank, shaft, and gear head. If the seller cannot demonstrate operation, price it as a repair project rather than a working trimmer.
Keep the repair scope narrow. Replace consumables such as line or a filter when needed, but avoid paying for cosmetic restoration or premium attachments that are not required for the work. If a shop identifies a major engine or shaft repair, compare its written estimate against the price of a tested used unit or newer replacement.
Private sellers may accept a lower offer when a machine has been listed for several weeks, but negotiation should be based on verified issues and realistic repair quotes. Transporting a bulky tool locally and paying cash can simplify a transaction, but a low price is not a reason to skip the safety and operating checks.
The safest savings come from buying a tested machine with only predictable maintenance needs. A discounted FS 120 with unknown compression, missing controls, or a damaged guard can become more expensive than a better-documented listing.