Awesome post. I'd like to share my experience with purchasing a watch and paying through Western Union. When you use WU you have a couple of options as to how they get your money. The option I chose was to give them my checking account number and bank routing number. It seemed the most convenient since I didn't even have to leave my house. While convenient, I don't recommend using direct bank account debit. Firstly, if you're in the US like me and sending to China, be prepared to have to call them up and explain yourself. They'll want to know who you're sending to and why. DON'T tell them your buying a watch.
The other issue is the delay. There's at least a 4 business day delay. I submitted my payment on a Friday, and so it was the following Thursday before my funds were available to the dealer to receive. If you choose to go WU, its going to be faster and come with less hassle, to just go to an ATM and get cash and take it to the nearest WU desk, likely there's an ATM close by anyway.