County and municipal agencies in Marin County, California sell surplus through online auction sites like GovDeals and Public Surplus. BidProwl tracks all of them in one place: 7 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.
7 live auctions across Marin County right now.

211 HILLSIDE DR, Fairfax, CA 94930. 2 bed | 1 bath | 924 sq ft. Type: FORECLOSURE

6565 SIR FRANCIS DRAKE BLVD, Forest Knolls, CA 94933. 2 bed | 3 bath | 1,939 sq ft. Type: bank-owned. List price: $976,260

3 Cylinder Diesel Engine, 6 ft x 11 ft 6 in Belt Feeder 8 ft x 3 ft 2 in Double Deck Screen, 31 in Wide Feed Conveyor, 21 in Wide Left Discharge Conve...

355 GRANDVIEW AVE, Novato, CA 94945. 3 bed | 1 bath | 1,915 sq ft. Type: bank-owned. List price: $365,000