min of 1pp for any Master on Antonia. Goes up to 10pp [the most I've seen paid for a Master]. I think I got lucky on that 10pp [level 44 Paladin spell or skill, can't remember] though.
Seems to be 1p for Tier 1, 2-3pp for Tier 2, 3-5pp for Tier 3 and then it gets weird.
Why not join the Crafting/Trading channels ask too.
What I want to know is how much $ I can get on one of those Exchange servers ^ ^.