Target Customer Information Shows Up on the Black Market by NICOLE PERLROTH by Derek McKinney | Posted on December 20, 2013 By NICOLE PERLROTH Customer information stolen in a security breach at Target stores has already begun flooding the black market, where card numbers are selling for as little as a quarter and as much as $100. Published: December 20, 2013 at 12:00AM from NYT Technology http://nyti.ms/18Y0clD via