Never purchase anything if they only have western union as the
method of payment.
buyer is not protected at all. Seller will have smaller market
since in western union, seller pays all the charges (I think
so).
At least Paypal help you when you escalate a claim. Only that when
you are the seller, you must ship via registered mail and please
read the instruction carefully. It is somewhere in paypal website.
this is very important because if buyer escalates the claim and you
do not follow the guideline provided by paypal, you will lose the
case immediately.