How much is a league-switch worth? According to this story in the New York Post, Jim Crane thinks it’s worth $50 million:
Apparently this is a reasonable enough demand to where MLB is negotiating with him on it and “they’re in the ballpark.”
Things that justify some discount, I presume, are the later games the Astros will have to play due to trips to Anaheim, Oakland and Seattle as opposed to the almost-entirely central time zone schedule they have in the NL Central. Of course the novelty of new competition and the new rivalry with the Rangers may very well add to the coffers in the short term.
Everything it negotiable, it seems.