The cost for "priceless items" is always way out of reach. These outtakes will be slowly let out-over time, to maximise the profits of them and then they will work on cleaning them up....and release them again with better color, or in more complete form such the complete concerts as filmed etc....Studios "almost never" sell single films and all their workparts to anyone-(they may sell their total film vaults-but not single films)
Warners knows that they can sit on the outtakes for a long long time-because the value goes up.
They have several times re-released Elvis films of less value than TTWII and EOT and always end up making money-they will not sell.
Just as Sony/RCA will not ever sell the recordings....business is business and they know they can make money, perhaps, forever on these things.