Have you seen the secondary market for that? Current ebay listings are $70, and most of the sold copies were over $50.
Or they can just do another release of Columbia Classics volume 2.
It was much cheaper than that in the first several months after release IIRC -- more like $15-20+shipping for most of the titles from that set, including Social Network.
Heck! IF someone really wants the SN 4K quite that much, I'd gladly sell mine (inclusive of the 4K digital copy) for $30+shipping, LOL -- I really don't need better than my old BD... and already have the 4K digital.
_Man_