The BBB gives it an A+, but that doesn't mean it is a good way to go. It is a third party, online business that coordinates with other entities that want to auction off their vehicles. The bummer part of this is Public Surplus deals only with the financial part of it. Any logistics must go through the actual owner of the vehicle.
Many of the vehicles are government surplus, so that means you need to work around government hours. Also, every state agency has some lame bureaucratic requirements that could very well conflict with your schedule or needs and Public Surplus's rules. For example, the owner of the vehicle may require that you move the vehicle within 24 hours. Public Surplus may hold onto your money for 48 hours before releasing the vehicle. This could give you and/or the owner of the vehicle some unwarranted yet still legal grief. This is very unlikely to happen if one auctioneer at a time did one state agency at a time.
I'm not apposed to auctions, but keep in mind every auction is somewhat different. As soon as you win a bid, you are locked into an agreement whether you read the rules or not. When you use Public Surplus, you aren't dealing with one auction- it is more like dealing with several auctions at one site. Very hard to keep track if you are bidding on multiple vehicles from multiple owners.
I refuse to buy auction vehicles because you cannot reasonably have them checked out. It's like playing the lottery with worse odds. If the cost of the auction fees, the vehicle, and the cost of the repairs is less than the price of scrap, then at least you would only be out your time.
There are exceptions of course. The vehicle may have an otherwise highly expensive, rare rear differential that you need for a custom build. Or you may have some inside information that a million dollars is hidden in the fuel tank.