Honestly, I don't think Bushrod will get anything close to these numbers from the Saints. Maybe some other team, just not the Saints. Right now he's at about 6.5 million a year, and I think that's the apex of his value to the Saints.
in actuality a team will probably meet in the middle and end up giving him somewhere around 8 mil / per. Unless one team falls in love and gives upwards of 9.