Springing surprise Black Friday deals has become a staple of retailers in recent years as a way of driving extra sales on the first day of the holiday shopping season. But a host of sites have emerged that exposed many bargains this year ahead of time. The sites, which troll retailer Web pages to find unpublished sites, revealed specials such as Circuit City selling Motorola RAZR phones for $19.99 and Best Buy having a special on laptops for $379.99.