A list of auction and related sites I try to keep an eye on. Many specific to Michigan but some that are US national.

Michigan

• MI BidCorp - Mostly police, TSA, and municipality auctions
• BidNet - I've only seen MI (even though it says nationwide). Seems to be mostly counties and municipalities. TODO: I cant seem to find a URL for this one or if it still exists. There are still live links on municipality websites
• PublicSurplus - Nationwide but lots of MI stuff, Lot of education (universities) and municipalities/cities
• Sheridan Auction Service - Sells DNR stuff, but online, and other interesting things
• HiBid (Michigan specific) - Seems like a lot of auctioneers use this? LOTS of auctions, lots of junk, but there are categories for everything which is useful. I usually search through only interesting auctions, or through specific categories.
• RJMAuctions - Company liquidations. Usually automotive related but seem some cool tech too

You might find more by searching for local auctioneers and going from there too.

Michigan Land

Land/property specific.

• MI DNR - Land for sale from DNR. They auction off larger amounts bi-annually (in person?), this is usually what's left over.
• ... others removed, links too old ...

Each county usually handles all its own tax foreclosures in separate systems, not easy to link to.

US

• GSA Auctions - Nationwide federal government auctions
• GovDeals - Nationwide & Canada. Cities and other entities. Really bad search. Go to location search at the top, type in zip code, search, hit "show all listings". Has affiliated sites NetworkInternational and AllSurplus too.
• Liquidation.com, sells bulk returns from Amazon, Best Buy, Home Depot, etc
• GovPlanet - Has location search, seems well-known/lots of bidders
• BidNow - JDs mom sent me this one

If you know of any more good ones, send me an email!