Looking for an excuse to try out BlackBerry's latest flagship? Here's one: now it's cheap. Folks willing to sign up for a usual two year agreement can score the BlackBerry Z10 for $99 at both AT&T and Verizon or a mere $49 at Amazon. The price drop is most likely designed to spur sales in the wake of the Canadian company's $84 million loss last quarter. "Now is the right time to adj