While I am delighted to learn more about Ea-Nasir, I don't think I know any worse copper merchants (or any at all)

Well, according to further replies, Ilabrat-bāni was not a good person to give money to if you wanted actual metal back in return.

(I have seen a macro which transfers the quotation from Pirates of the Caribbean to Ea-nāṣir: "You are without doubt the worst copper merchant I've heard of." – "But you have heard of me.")