sanctioning fee's for fighter to hold belts

for some reason i was just thinking weather George Groves is now the IBO 168 belt holder after beating JR.. Turns out they could not agree over the sanctioning fee before the fight , so therefore the belt is now vacant (despite it being billed as a unification match) i was left wondering a couple of things, does the more presigouis the belt vary the amount the fighter has to pay. ie i assume that the WBC champion has to pay a lot more to jose sulliman than to joe bloggs from the IBO. and also do you think that say floyd mayeather in his pomp would pay less than i dunno lets say Scott quigg , just so their belt would be associated with a more prestigious fighter. can someone give me the low down on belts and fee's ??