County and municipal agencies in Essex County, New York sell surplus through online auction sites like GovDeals and Public Surplus. BidProwl tracks all of them in one place: 3 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.
3 live auctions across Essex County right now.

2008 Ford Focus - Automobiles/Cars - Seller: State of New York – Fleet

2011 Ford Crown Victoria - Automobiles/Cars - Seller: State of New York – Fleet

2010 Ford Crown Victoria - Automobiles/Cars - Seller: State of New York – Fleet