i needed to rent a car for a few weeks. i went on the "Priceline Negotiator" section of the website.
I made an offer. (you need to give them your credit card info before they will consider your offer). the offer i made them was rejected. i made another offer.
it too was rejected. i then moved over and used Hotwire and booked a car without any trouble. Lo and behold, Priceline bills my card for the offer i made them that THEY rejected.
My credit card company is battling it out with them now, but who needs the hassle. It goes without saying that i will NEVER go on their website again.