PHOENIX (AP) -- A Mesa man accused of trying to buy a sex slave for $4,000 to keep in a home dungeon he allegedly was building has been sentenced to seven years in federal prison. Prosecutors say 67-year-old Edward Jay Stevens was sentenced Monday in U.S. District Court in Phoenix. Stevens previously had pleaded guilty to attempting to engage in trafficking with respect to peonage, slavery, involuntary servitude and forced labor.He was arrested in an FBI sting in 2013 that involved undercover agents posing as a human trafficking ring on a website. Court records show Stevens responded to an advertisement for an auction of kidnapped females. Stevens had conversations with undercover FBI agents in which he allegedly said he was interested in purchasing a kidnapped woman and holding her against her will.