We buy semi trucks
Sell Your Semi Truck
Sleeper and day cab Class 8 — priced on engine, emissions status, drivetrain and title condition.
- Written offers
- Transport arranged
- Running or not
- California
On this page
MachineryBarn buys used Class 8 tractors — sleeper cabs, day cabs and vocational trucks — running or not. Trucks price differently from every other category we buy, and the reason is regulation: California restricts which heavy diesel trucks can operate in the state, so engine year and emissions equipment often matter more than the odometer. A high-mile truck with a clean aftertreatment system and a desirable drivetrain can be worth more than a lower-mile truck that no California fleet can legally run.
What counts as a semi truck
A semi truck, or tractor, is the powered unit that pulls a semi-trailer via a fifth wheel. Class 8 covers anything over 33,000 lb gross vehicle weight rating, which is essentially all over-the-road tractors. The two body configurations are the sleeper, which has a bunk area behind the cab for long-haul work, and the day cab, which does not and is used for regional, drayage and vocational duty.
Trucks are described by their drivetrain rather than their weight. A 6x4 has two driven rear axles and is the standard road tractor; a 4x2 has one and is lighter and more fuel efficient but limited on weight; a 6x6 adds front drive for off-road and vocational work. Wheelbase and rear axle ratio matter more to resale than most sellers expect, because they determine what work the truck suits.
Where these machines usually come from
- Over-the-road long haul, almost always sleeper cabs
- Regional and local delivery, usually day cabs
- Port and rail drayage, where day cabs dominate
- Construction and aggregate haul, often with heavier vocational specs
- Agricultural haul, seasonal and frequently older equipment
- Owner-operator use, where a single truck is the whole business
Semi Trucks we buy
Configuration changes who the next buyer is, so it changes the offer. These are the variants worth naming when you describe your machine.
- Sleeper cab
- Bunk compartment behind the cab, described by length in inches and by roof profile. Raised-roof condo sleepers suit long-haul van and reefer work; mid-roof suits flatbed and tanker work, where a lower profile reduces drag behind a shorter trailer; flat tops suit heavy haul and height-constrained work. A truck whose roof profile does not match the trailer type it will pull is a narrower sale.
- Day cab
- No sleeper, so shorter, lighter and more manoeuvrable. Wheelbase is the defining dimension: short wheelbase turns tightly for container and drayage work, longer wheelbase rides better for regional running. Rear axle ratio follows the work — low for heavy pulling and stop-start duty, taller for road speed.
- Yard tractor / terminal spotter
- A different machine, not a road tractor. Built to move trailers within a yard. Bought, but priced as what it is — say plainly if that is what you have.
- Vocational and heavy-spec tractor
- Heavier axles, stiffer suspension, sometimes a wet kit. Built for construction and heavy haul rather than road miles.
- Glider kit
- A new chassis fitted with a rebuilt older drivetrain. Tell us if a truck is a glider — the regulatory position and the buyer pool are both different, and it is not always apparent from the paperwork.
What determines a used semi truck's value
Roughly in order of how much each one moves the number.
- 1
Engine year and emissions equipment
In California this is usually the first question, ahead of mileage. CARB rules restrict which heavy diesel vehicles may operate in the state, and enforcement runs through DMV registration. A truck that cannot be registered for California use has a real market — out of state and for export — but it is a different market, and that is reflected in the offer.
How to check it: Find the engine emissions label on the valve cover or door jamb for the model year and family. Confirm your own obligations with CARB directly; the requirements have changed repeatedly.
- 2
Aftertreatment condition
The DPF, DEF and SCR system is one of the most expensive things on a modern truck to put right. Regen problems, a deleted or bypassed system, or a truck running in derate all change the number substantially. A deleted system is a particular issue because it cannot be legally sold for on-road use in that condition. Duty matters here: drayage and yard work accumulate huge idle and low-speed hours during which the engine struggles to reach regeneration temperature, so a day cab off port work has usually asked far more of its DPF than the odometer suggests.
How to check it: Note any active dash lights, whether the truck is in derate, DEF quality faults, and how recently the DPF was cleaned or replaced.
- 3
Engine make and model
Buyers have strong and durable preferences here. Cummins X15 and ISX, Detroit DD13 and DD15, PACCAR MX-13 and Volvo D13 all trade differently, and some engine and model-year combinations carry known reputations that follow them through the used market.
- 4
Transmission type
Automated manuals — Eaton Endurant and UltraShift, Detroit DT12, Volvo I-Shift, Mack mDRIVE — now command a premium over manual gearboxes for most road work, because the driver pool for manuals keeps shrinking. A 10, 13 or 18-speed manual still suits heavy haul and some vocational buyers.
- 5
Mileage and service history
Miles still matter, particularly around the points where major service is expected. Documented in-frame or overhaul work is worth showing — a rebuilt engine with paperwork is a very different proposition from a rebuilt engine without it.
- 6
Rear axle ratio, suspension and wheelbase
These decide what the truck is good for. A fast ratio on air ride with a long wheelbase is a highway truck; a low ratio on spring suspension with a short wheelbase is a vocational one. Being wrong for a buyer's work is not a discount, it is a disqualification.
- 7
Tyres, brakes and DOT inspection status
A full set of drive tyres and a brake job are substantial costs, and both are checked immediately. A current DOT annual inspection is worth having, and its absence prompts an assumption that something is due.
How to check it: Note tread depth on steers and drives, whether the truck is on drums or discs, and the date of the last annual inspection.
- 8
APU, on sleeper trucks
An auxiliary power unit runs climate control and power without idling the main engine. It saves fuel, holds engine hours down, and matters where idle rules apply. A working APU is a genuine value add on a sleeper — list its make and hours. A truck without one has usually idled its engine overnight, which shows in the hour-to-mile ratio.
- 9
Sleeper interior condition, on sleeper trucks
Where sleeper valuation departs from day cabs. A driver lives in it, so mattress, upholstery, cabinetry and climate control all matter — and water ingress at the sleeper roof and windows is the specific concern, because the damage runs into the insulation and electrics behind the panels.
How to check it: Check the sleeper ceiling and side walls for staining, test the bunk heater and air conditioning, and look at cabinet and upholstery condition.
- 10
Wet kit and specification extras
A wet kit makes a tractor immediately usable with dump and tanker trailers and matters to those buyers specifically. Headache racks, chains and binders all count and should be listed rather than left to be discovered.
- 11
Title condition
Unlike construction equipment, trucks are titled. A clean California title transfers easily; a salvage or rebuilt brand, an out-of-state title, or a lien still recorded all add steps and affect the number.
How usage is measured
Odometer miles first, but engine hours matter too and many sellers overlook them. A truck with high idle hours has more engine wear than its mileage suggests — reefer work and long waits at ports both accumulate hours without miles. If the ECM will report both, give us both.
What gets inspected on a semi truck
Knowing what a buyer looks at lets you describe the machine accurately the first time, which avoids the offer changing later.
Engine and aftertreatment
Cold start, blow-by, oil and coolant condition, active and stored fault codes, DPF soot loading, DEF system function, and any sign of a delete or tune.
Drivetrain
Clutch or AMT engagement quality, shift behaviour under load, driveline vibration, and differential oil condition.
Frame and fifth wheel
Frame rail cracks and prior repair, crossmember condition, fifth wheel plate wear and locking jaw play, slider function and locking, and the condition of the air and electrical connections. Trucks in container and drayage work couple and uncouple constantly, so plate and jaw wear runs ahead of mileage and a seized slider is a real defect.
Sleeper compartment, where fitted
Water staining at the roof and window seals, bunk heater and air conditioning function, upholstery and cabinetry condition, and inverter or power system operation.
Suspension and steering
Air bag and shock condition, leaf spring cracks, king pin play, and steer tyre wear pattern.
Brakes and air system
Lining thickness, drum or rotor condition, air leak-down rate, and compressor performance.
Cab and interior
Bunk condition, HVAC function, seat and steering wheel wear as a mileage cross-check, dash warning lights, and water ingress around the roof and windscreen.
Wear items that dominate cost on this class
What we need to price your semi truck
You do not need all of it to start. The more of it you have, the closer the first number is to the final one.
- Year, make, model and VIN
- Odometer reading, and engine hours if the ECM reports them
- Engine make, model and emissions model year
- Transmission type — manual with speed count, or which automated unit
- Sleeper or day cab, and sleeper size if applicable
- Rear axle ratio and suspension type, if you have them
- Current DOT annual inspection status
- Any active dash lights, fault codes, or derate condition
- Title status — in hand, lien recorded, out of state, or branded
- Whether it drives, and if not, what stopped it
Common situations
The circumstances that come up most often when someone sells a semi truck, and what each one actually means for the sale.
The truck is too old to register in California
This is the most common reason a California owner ends up selling. The truck is not worthless — there is an active market out of state and for export — but the buyer is a different buyer, and that is what the offer reflects. Tell us the engine model year up front so we price it against the right market rather than re-cutting later.
The engine is blown or the truck is in derate
Still bought. A non-running Class 8 tractor has a well-established market for its drivetrain, cab and running gear. What we need is what happened and when, not a diagnosis — say whether it stopped suddenly, lost oil pressure, overheated, or simply will not clear a fault.
There is still a lien on the title
Normal. Because trucks are titled, the lien is recorded on the title itself rather than as a UCC filing, so the lender has to release it before ownership transfers. Get a current payoff figure from your lender — the payoff is settled as part of the purchase and you receive the balance.
An owner-operator winding down
Bring the whole picture: the tractor, any trailer, and the service records. Trucks with documented maintenance sell better than trucks without, and a matched tractor-trailer pair is often easier to move as one transaction.
A fleet cycling out older units
Send the list with VINs, mileage and engine years. Fleet trucks usually have consistent service intervals and comparable specs, which makes them straightforward to price as a group and to collect in scheduled batches rather than all at once.
The aftertreatment system has been deleted
Say so plainly. It changes what can legally be done with the truck and therefore who can buy it. Discovering it later costs everyone time and results in a re-cut offer — telling us at the start does not.
Moving a semi truck
A running truck with current registration and insurance can be driven to us, which is the simplest way to collect this category. A truck that will not run is towed, and a truck without current registration or insurance has to be trailered rather than driven — worth knowing early, because it changes how collection is arranged. Either way the cost is ours and it is already inside the offer.
Ownership and paperwork
This is the significant difference from construction equipment: trucks are titled. Ownership transfers through the California DMV, an odometer disclosure is part of the transfer, and any lien is recorded on the title itself rather than as a UCC filing. Have the title to hand, or know exactly who holds it. Salvage and rebuilt brands, out-of-state titles and missing titles are all workable, but each adds steps and should be flagged before an offer is made rather than after.
Attachments and extras
Wet kits, headache racks, APUs, chains and binders, spare wheels and any trailer being sold with the tractor should all be listed. On trucks in particular, sellers often assume the extras are included and buyers assume they are not.
Makes and model families we see most
We buy semi trucks from manufacturers beyond this list. These are the ones that come up most often, with the series a seller is likely to recognise from the machine.
| Manufacturer | Model families |
|---|---|
| Freightliner | Cascadia, Columbia, Coronado, M2 vocational |
| Peterbilt | 579, 589, 567, 389, 386, 384 |
| Kenworth | T680, T880, W900, W990, T800 |
| Volvo | VNL, VNR, VHD |
| International | LT, ProStar, LoneStar, HX vocational |
| Mack | Anthem, Pinnacle, Granite |
| Western Star | 47X, 49X, 4900, 5700 |
Get a cash offer
Get an offer on your semi truck
Tell us what you have and what shape it is in. We come back with a cash figure in writing.
- A written offer, not an estimate
- Transport arranged and priced into the offer
- Running or not, any make
Prefer to talk it through?
(916) 740-7755Get a Cash Offer
Any brand, any condition, any hours.
- Written offer
- Transport arranged
- No Spam
Where we buy semi trucks
We buy across California. Our published town-level coverage is concentrated in these counties.
