I've commented on this issue many times. If you want him, be prepared to pay more, but most of all, be prepared to offer again and again and again. This same scenario played out for me a few seasons back. I earmarked his bonus for an international after I got that message and initial rejection. When the internationals went dry I just offered what I had left (about $9M of his $11.5M second asking price) over and over. I had nothing better to do with the money. He refused every time...........until the last time. After the regular season was over and before the playoffs began.
Good luck.