It seems if you take the agi + the ac and multiply by 10 you get a price that both is good for the master tailor selling it and yet low enought the monks seem happy. :-)
Due to this stuff I have actually been thinking about making a monk LOL... sometimes I have the stupidest reasons for making new characters.
Wilil/Malacar Shaman tailor/Enchanter
May the 6 hammers guide you