So with Luffy’s new bounty reveled, I’ve been thinking about the bounty’s of some other characters. So I will try to guess Sabos bounty. 1) He is the second in command of the RA 2) in terms of strength he is on admiral level(this alone means probably above 1,000,000,000). He also defeated Burgess with ease. And he is one of the commanders of a yonkou. 3) It's believed by many fans that dragon has the highest bounty in the world. He is the most wanted man by the WG. So it’s also logical that he has the highest bounty. And Sabo is right under him and has control of all the lower RA members. He also has direct contact with Dragon. This is why I believe Sabo’s bounty is higher than any pirate, except the yonkous them self. I would guess between 1.800,000,000 and 2,000,000,000.