I watched Return of the Jedi last week.
When Boushh shows up with Chewie and Jabba offers her 25K, then she demands 50K, I always thought it was Jabba trying to stiff her (with the original reward being 50K). But on this viewing I understood it to be that the original reward was 25K and Boushh was trying to inflate the reward price.
Maybe everyone else already interpreted it that way.