An online inflation calculator I found on line, says that 6m in todays dollars is 28m dollars... However if you tried to repeat the experiment, upgrading a broken person, using 1976 tech, it's probably less than 1m.
Although, although, as a collectors item, how much is Steve Austin's corpse worth, if he's always been a secret agent that was never famous for being a cyborg?
My answer to that would be "it depends" if they wrote a story about Steve being dead I'd assume the government would confiscate any of his artificial parts leaving a disfigured corpse, the same for Jamie Somers the bionic woman.