now that Comey has publicly offered a ballpark price that the FBI paid
FYI: “The FBI paid under $1 million for the technique used to unlock the iPhone used by one of the San Bernardino shooters - a figure smaller than the $1.3 million the agency’s chief initially indicated the hack cost, several U.S. government sources said.”
source: http://www.reuters.com/article/us-apple-encryption-idUSKCN0XQ032