In Tarant while on the second quest that Madam Lil gives you, when talking to Mr. Langley say that Madam Lil sent you. Then, choose either response (other than bye), then the one that begins with "[Menacing]", then say that you do not trust him, and finally choose "Okay [you take the coin] but I'll be back for the rest". After you are done, repeat this as many times as needed for free money.