County and municipal agencies in Marathon County, Wisconsin sell surplus through online auction sites like GovDeals and Public Surplus. BidProwl tracks all of them in one place: 2 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.
2 live auctions across Marathon County right now.

530 HUMBOLDT AVE, Wausau, WI 54403. 4 bed | 1 bath | 1,500 sq ft. Type: bank-owned. List price: $62,000

605 SOUTH 3RD AVE, Wausau, WI 54401. 3 bed | 1 bath | 1,268 sq ft. Type: bank-owned. List price: $71,800