The funny thing is, people that charge for crafting make TONS less than the people that do it for free. If you have two toons of the same profession (preferably with non-similar names) park them both in trade and spame the same profession. One for 'tips welcome' and one for a fee. Watch the results... they are hilarious.

Any time I see a crafter charging too much to craft a pattern I have, I spam that i'll do the same one for free and come to them. Then I bring my whole team and buff them and offer a free port. I've gotten as high as 100g tips