This has been said before, but the lowball Red Sox tried to lock up Betts at least twice -- each time offering a contract his market value had exceeded -- before they realized he was adamant about getting what he deserved.
Once they knew Mookie was serious, they extended Sale and Bogey -- who both accepted lowball Red Sox offers below what they may have earned in free agency. Sale got hurt (and maybe already was), so we'll never know about him, but X certainly did ok for himself last winter.
Eovaldi also accepted his first big payday from Dombro -- which, like JD's, was a true market value contract: $17M AAV for a good starter (even though a few posters who still complain about his health forget he is a pitcher).