You can find a full post and responses to it here:

http://www.replica-watches-guide.com/forum/index.php?showtopic=511

"This tip is for non-US buyers that doesn't have / want to use a credit card, or where credit card payments are not acceptable.

Western Union exchange rates are always higher than official rates. Plus I got charged US$30 for the transaction. I was told that sending money via WU is rare in my country and the lady at the bank doesn't even know what she was doing at and there were some confusions at first.

The only thing that Western Union is good for is that it's instant. As soon as the transaction in done, the seller can collect his / money instantly.

Make sure you get a receipt containing the MTCN (Money Transfer Control Number). This information is crucial for the collector at the other end.

I ended up paying US$397 for a suppossedly US$350 watch (That's before tax! I will get slapped with more fees and taxes when it comes in)"