How do you purchase a vehicle at a public auto auction?

to make a purchase at a public auto auction is easier and safe as in other types of auctions...you can make it by bidding on cars till you win or if you find a reasonable price and it fits to you, you click on " buy now" price. Every Auto Auction has its method of payment. For example through PayPal. It is one of the safety process to make a purchase...i always choose this method...And then you deal with the seller about the shipping.