County and municipal agencies in Lake County, California sell surplus through online auction sites like GovDeals and Public Surplus. BidProwl tracks all of them in one place: 10 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.
10 live auctions across Lake County right now.

Loch Lomond, CA · HUD
141d 16h left
Buy Now$245,000

Lower Lake, CA · HUD
136d 16h left
Buy Now$345,000

Clearlake, CA · Hubzu
4d 4h left
$120,000