James Earl Jones always regretted one huge mistake – he opted for a meager $7,000 payday for voicing the iconic Darth Vader in Star Wars. RadarOnline.com can reveal the actor’s family was therefore robbed of millions of dollars they could have inherited when Jones passed away. The booming-voiced baritone, who died at age 93 on September 9, was a starving actor in 1977 when he was booked for the recording session. Recalling the two and a half hours he spent doing the voiceover work, Jones recalled: “$7,000 was big money for me in those days.” He explained: “I was broke and needed the money to p…