If I recall, the reward on the Baron Ludwig was something like 500,000 and the reward on Bargle the Infamous was half that. Not that I'd ever let my PCs collect, mind you.
You may be thinking of a couple of pictures in the main book which depicted portraits of the Baron and Bargle before-and-after the halflings decided to "improve" on them...
Incidentally, I've never actually seen the adventure that everyone is referring to here, I encountered Bargle through the Gazetteers. The basic set I had was the full-color cover (by Otus, probably) of a party fighting a green dragon. It had one rulebooks and a copy of B2, Keep on the Borderlands. And of course the cheap plastic dice with crayon. Is the red box everyone is talking about the one with the dragon on a horde, and two seperate books instead of one?