Except that it will never be the case.
The Sox have a reputation for spending especially among agents, and the price for him will never come down.
Last week on MLB Network radio, a caller asked Steve Phillips if the Mike Moustakas signs a 3 yr / $39mill deal, does that mean the Angels overreacted and signed Zack Cozart too quickly. Phillips quickly told him that if Moustakas price fell that low, it would be because the Angels pulled out of the market, and as long as the Angels were in the market, they would not have been able to get Moustakas for that price.
That's how I see it with Martinez. That the Sox haven't dropped out keeps the price up. Right now, that $30mill/season price appears to be for Boston and Boston alone. He may eventually sign for less, but not very likely here.
And frankly, if he is threatening to hold out, pass on him. Right now the threat is "hold out into Spring Training." That's 4 weeks away. If he isn't signed by then, how long will he hold out? Into the season? While it was a little different with players like Stephen Drew and Kendrys Morales, they did show that a prolonged holdout actually does seem to turn into a lost season for a player.
And a lost $30mill season for a 31yo player who wants to be signed into his late 30's is a financial sinkhole for this team. How many good seasons does JD have left? And he appears to be prepared to give one of them away because he feels a contract that will guarantee to put food on the table for his great great great grandchildren simply isn't good enough...