For the most part I totally agree with the people saying we need to be charging for enchants. Any time someone wants me to do a rare chant on their weapon or armor that I know is gonna give their toon an insane stat boost I expect them to pay for it. But I will charge less if they provide all the mats, I'm not saying a beggers tip, but maybe not 30 gold either. The only times I've ever done a chant free or for a tip, is when its some lame chant that we get from the trainer and the mats are provided by the toon requesting the chant. In that case I'm willing to do a chant for the skill point, most of the time we can't even give chants like that away so we burn mats up by chanting ourselvs over and over. 

So yeah, charge the high prices for the chants that are rare and are serious stat upgrades, And maybe offer a small discount if they bring the mats with them. Give the junk chants away if you can find someone who wants it.