User blog comment:Black Leg Sanji/Strawhat's New World Bounties/@comment-77.164.220.226-20130123200545

Luffy: 550 - 580 million - defeat of ceaser clown,  goverment thinks he found out about SAD allience with law ( smoker probably tells them that luffy beat him instead of admitting working together ) defeating pacifista in 1 blow, fishman war.

Zoro: 300 - 350 - insane sword fighter, they know his potential, war at fishman island, defeating a pacifista with ease ( they know he withstood 2 sichibukai attacks moria and kuma ).

Sanji: 200 - 260: fighting at fishman island, easy killing pacifista, he did serious damage against vergo.

Franky: 100 - 150: they see his insane ship building skills, a flying ship capable of going backwards being able to escape at any time, complete cyborg, has vegapunks designs inside him, stronger then pacisista.

robin: 100 - 120: being able to read ponyglyph, fishman war.

Chopper: 50 - 75 million: smoker knows that he isnt a pet and knows his potential.

Brook: 85 - 95: not sure about him.

Nami: 50 - 60 mil, weather control, taking down doflamingo's surbornates with ease.

usopp: 80 - 100?: taking out doflamingos surbornates, and fishman war.

this is all a guess, but not so ridicilous. i can see these happen