Unless absolutely desperate, i would avoid BUYING from this event. You have virtually ZERO guarantee of the vehicle and the prices usually are much higher than what would be possible 'on the street.' Add to that the sales commission and you simply should avoid such events.
Also, before buying ANY car over $5k from ANYONE i would have a professional mechanic do a full PPI (pre-purchase inspection). A Carfax can be misleading!
Just my humble 2 Yen.