County and municipal agencies in Humboldt County, California sell surplus through online auction sites like GovDeals and Public Surplus. BidProwl tracks all of them in one place: 29 live lots right now. Register on the platform hosting the lot you want; most items are local pickup only.
The usual mix is retired fleet vehicles and police cruisers, public works equipment, school district electronics and furniture, and unclaimed or seized property. Inventory refreshes daily as agencies list new surplus.
29 live auctions across Humboldt County right now.

1809 PENINSULA DR, ARCATA, CA 95521. 2 bed | 1 bath | 896 sq ft | built 1992 | 6,534 sq ft lot. Opportunity awaits in the coastal community of Manila!...

Various copier toner, ink, and supply items. Sold as a lot. See .pdf file for product list.
Salvage/damaged lot, toner and supply items

STEEL DRUM ROLLER NO KNOWN ISSUES Ran when parked
Salvage condition, ran when parked, condition unknown

RUNS, NO MECHANICAL ISSUES Runs strong.
Listed as salvage/damaged

Flat deck tilt trailer. No known issues. Used typical with age One owner, trailer is in good condition. Serviced every year. Ready to go to work.
Listed as Salvage/Damaged, check title status

Perkins diesel engine Machine runs good. Has electrical issue with glow plug system.
Electrical issue with glow plug system, may need repair

STEEL DRUM ROLLER. (PARTS ONLY! NON OPERATIONAL) Parts only. Motor known good.
Salvage, parts only, non-operational

Perkins diesel engine with 991hrs. engine runs strong. No hydraulic function from aux hydraulic system to move head. RUNS
Aux hydraulic system non-functional, head won't move

STEEL DRUM ROLLER NO KNOWN ISSUES Ran when parked
Salvage/Damaged, ran when parked

Perkins diesel engine RUNS STRONG, NO MECHANICAL ISSUES
Salvage/Damaged, listed for parts or repair

STEEL DRUM ROLLER POSSIBLE BROKEN CAM, NO FUEL DELIVERY Needs engine work. Everything else is in good condition.
Engine not running, possible broken cam, needs work

Flat deck tilt trailer. No known issues. Used typical with age
Marked as Salvage/Damaged, sold as-is

CRANE TRUCK. 42K MODEL 800C NATIONAL CRANE (2222hr on crane) ALL CERTS CURRENT: CA Crane comes with the optional pay out reel for aux attachments, opt...
Salvage/damaged condition, truck may not be road-worthy

TRANSFER TRUCK. NO KNOWN ISSUES Includes: 2001 RELIANCE 2TR0HD22 VIN 1REFA52041C011601 Hydraulic controls for transfer box. Both units have a reliance...
Salvage vehicle, exhaust system has issues

STEEL DRUM ROLLER NO KNOWN ISSUES Steel drum roller. Good operating condition ready to work.
Listed as salvage/damaged item

BACKHOE LOADER. NO 4X4, NEEDS OUTPUT SHAFT

BACKHOE LOADER NO KNOWN ISSUES

Lot of 9 each.

Kubota diesel engine. RUNS, NO ISSUES Perkins diesel engine with 991hrs. engine runs strong. No hydraulic function from aux hydraulic system to move...
Aux hydraulic system non-functional, engine runs

STEEL DRUM ROLLER NO KNOWN ISSUES Steel drum roller, ran when parked
Salvage/Damaged, ran when parked

Lot of 10 tires
Salvage condition, condition unknown for individual tires

Flat deck tilt trailer. No known issues. Used typical with age
Listed as salvage/damaged, flat deck tilt trailer

10YD. DUMP NO KNOWN ISSUES 10yrd Columbia rock box. Runs strong.
Salvage/Damaged designation, verify actual condition before

Flat deck tilt trailer. No known issues. Used typical with age
Salvage/damaged title, tilt trailer