Car/Auto Auctions have been around for years and dealers get a lot of stock from auctions.
But for the average person buying a car from an auction is not so simple.
Yes, you can get a cheaper car, but you the reason it is cheaper is that you are not getting all the guarantees. Basically, you bid on it. You own it.
If you are a conservative person without much experience in motor vehicles, I would recommend that you do not just go out and buy a car from an auction.
However, if you have a mechanical eye, good observation and are willing to familiarize yourself with the process, then it can be a good way to pick up a bargain.
If you don't like the car you can usually sell it again and get your money back, even with a profit.
I have bought and sold several cars at auctions with great results and you can too. If you really want to get the lowdown before you start, then I recommend you read my book Motor Auction Profit Secrets. This will prepare you and incidentally also shows you how to profit from this activity as well.