Is there a system or guideline in 3.X or PF for setting up prices on higher level hirelings (preferably with PC classes) or monsters? Obviously, depending on the NPC or monster the price would have to be adjusted, but some baseline would be great to have something to work with.
I'd also appreciate if you could list any official monsters or NPCs that have a price to employ or buy them, that you know of. For example a war troll soldier costs 30 gp per day, while a seargant (4th level Fighter) takes 75.