Just some advice for you my man, and you can take it or leave it and I won't be the least bit insulted, but I'd stay away from WU and MG for payment, and in a case like this where it is a required part of doing business, I would find somewhere else to take my business.
WU and MG are being scrutinized and rejected by WU and MG themselves more than ever, AND they keep permanent records of EVERY transaction, AND they require you to show ID, AND they are expensive, AND they are very eager to work with LE, AND they have HD surveillance video of every transaction.
Other than that, they are a splendid option for paying for your illegal drug purchases.